Build Guide
How to use this build?
First of all, when you enter in a grift, you need to accumulate as soon as you can the 10 stacks of Soul Harvest.
Only now you can think to slay monsters with jade set in grifts 70+!
Once you find a nice group of monsters or an elite pack, you should use pinrahado to group them, then locust swarm.
The Vile Hive mojo guarantees that locust swarm spread very well thanks to the pestilence rune.
Now you should cast 2-3 times haunt and conclude with soul harvest.
Once you did this, repeat (the cooldown of soul harvest will be reduced both by the jade set bonus and the grave injustice passive).
In this process, you need to insert horrify to buff your armor and to control a bit the monsters.
Spirit walk (always present in wd builds) is good to skip dangers, to move fast and to insert the wd in the middle of the action.
As already said, with endless walk set you have to calibrate when you can standing still (doing more damage) and when you need to walk (to buff
your damage mitigation).
With furnace in the kanai cube, you need to focus on elite packs.
Elites will give you most of the progress bar that you need to arrive at the boss.
Some bosses are obviously better than others.
The worst i encountered is Erethon...he can oneshot you multiple times! -.-
UPDATE:
I try a little variation in the build, that can improve the results if the grift is good.
What skills I changed?
First of all, I wanted more damage, so I put the Confidence Ritual passive instead of Swampland Attunement.
To compensate the less capacity to survive, I change Locust Swarm rune from Diseased Swarm to Cloud of Insects, which reduces the damage done by monsters by 25%.
This change probably could be better in overall performance than put a Convention of Elements (COE) instead of Unity (this would be a very drastic drop for the wd toughness and the buff is not constant like the passive!). As already said, to keep COE in Endless Walk set variant, you must in fact give up some things!
Another passive that can be tested instead of Confidence Ritual is certainly Gruesome Feast (great buff to damage and toughness through health globes), maybe together with a follower with Solanium can work well.
UPDATE 28/11/2015
I would like to insert some of the considerations done in the comments here, like a FAQ, to facilitate the readers the discovery of the informations discussed!
Q: is In-Geom good in jade builds?
A: yes, but for speed things (like t8-10 rifts), not for high grifts.
Q: are the fetishes belt (Belt of Trascendence) and the slow belt (Hwoj Wrap) worth in a jade build?
A: yes, but they are not useful like the second haunt belt (Haunting Girdle). The fetishes with jade, in high grifts, are insignificant in term of damage (they are only useful for a little tank role) and as regards the other belt, we already have bane of the trapped that slows enemies! The fetishes belt maybe could be better if we choose to give up the unity for convention of elements and furnace for henri's mojo!
Q: can a poison rune (instead of cloud of insects) of locust swarm be better?
A: yes, in term of damage, but not a lot better. So it is not worth to lose a 25% damage mitigation for a little buff of locust swarm (when the ability that does most damage in jade builds is haunt).
Q: what about putting Pierce the Veil as passive for damage buff?
A: not a good passive, for 2 reasons:
1) the damage bonus is additive, while Confidence Ritual is an independent 25% multiplier!
2) could generate mana problems, especially if you don't use wormwood in the cube and have to cast manually locust swarm.
Q: What about putting Convention of Elements (COE)?
A: very good ring, but the damage buff is not constant. The COE variant is the only one that could compete with Endless Walk set variant. Obviously, the COE variant needs (if without Endless Walk set) to be accompanied by an hellfire amulet or Eye of Etlich for damage taken mitigation. We could also go for a fusion of the 2 variants, with both COE and Endless Walk set, but without unity, as some wds are doing recently on grifts 80+ in ptr!
Q: What about putting Ring of Royal Grandeur?
A: not a good choice! If we wear it (so not in the cube) we would lose lot of damage (this ring always rolls with attack speed and life on hit, so you can't have both Critical Hit Damage and Critical Hit Chance in the roll). I remember that (patch 2.0.5 notes): skills of jade builds (haunt/locust) calculate an average damage augmented by your critical hit chance and critical hit damage on application and apply that damage evenly over the duration of the entire dot! So having both CHD and CHC on a ring is very important. For example, in a ideal Compass Rose we can have both CHD, CHC and even cooldown reduction, together with socket obviously! If we instead put Ring of Royal Grandeur in the kanai cube (wearing quetzalcoatl), we should have a perfect roll on ring of Emptiness and anyway there aren't worthy items to put in the kanai cube armor slot.
Q: What about putting Henri's Perquisition mojo?
A: It could be ok, but we have to drop the Vile Hive mojo (loosing pestilence rune and nice buff for locust swarm), if you want to maintain furnace! If you want to use Henri's Mojo you probably have to give up the furnace and put Henri's mojo or Vile Hive in the cube, as some wds are doing in ptr. In addition to this, you could drop unity for convention of elements and in this case it could be useful to have fetishes belt for more tanking (just remember we lost the 50% damage taken mitigation of unity)! Obviously you need very good toughness to make this variant viable (in fact, you probably should put amethyst in the helm instead of diamond, if you go without unity!).
Q: what about putting bad medicine as defensive passive?
A: swampland attunement > bad medicine (and the effect of bad medicine is the same of the cloud of insect rune of locust swarm)!
Q: Is grin reaper worth in jade builds?
A: I don't think Grin Reaper is worth enough in a jade build, sure it can be tested, but I can already imagine that the results would not be great (the wd mimics maybe could cast haunt and locust, but I don't think they are effective on the key ability of jade set: cast soul harvest on monsters and concentrate all dots in one big damage)!
You need to use a poison rune for the locusts, the mojo only adds the spread effect, the damage type is determined by the rune. Also, pierce the veil is better than confidence ritual since mana costs are not an issue and you will deal damage from the dots even if you're not too close.
I also think that the Endless Walk set isn't worth it. You're better off with hellfire, grandeur, and then you can equip another thing in the armor slot. With hellfire you could have both confidence and pierce the veil. Or equip convention as well as the other rings.
Is the second haunt really worth losing the 15 fetishes that are always out in this build?
In-Geom is good for speed t8-10 builds. For high grifts the bonus of that sword is quite useless.
Yes, a poison rune for Locust Swarm would be better in term of damage (but not a lot better, my previous version of the build had a poison rune and was lower in performance than the actual; the ability that does most damage in jade builds is haunt not locust!). The cloud of insect rune guarantees instead a 25% damage taken reduction. It was used by me and the only other wd that cleared 80 in ptr!
As regards pierce the veil, if you have to cast manually locust swarm (because you have furnace in cube and not wormwood), the mana could be a problem. Moreover, pierce the veil is an additive buff (so not a true 20% damage buff), while Confidence Ritual is an independent 25% multiplier!
Hellfire can be certainly good associated with Convention of Elements, but with Hellfire you need a passive to survive (Swampland Attunement). To put Pierce the Veil (an addittive bonus, so not great!), you probably need to put royal ring in the cube, then have a perfect roll on ring of Emptiness, you have to drop Convention of Elements (losing lot of damage; if you drop unity you would not survive because not only you don't have Endless Walk damage mitigation, but also no defensive passive).
So what you can put in the kanai cube? Aquila Cuirass? The recent hoftix say "The 50% damage reduction of Aquila Cuirass now kicks in when the player reaches 90-95% resources".
With Pierce the Veil and the manually cast of locust, you probably not have this bonus active!
Henri's Mojo without putting royal ring? Could be ok, but you have to drop the Vile Hive mojo (loosing pestilence rune and good buff for locust swarm, buff higher than the difference between a poison rune and cloud of insect rune!).
Summarizing, i think there are only 2 ways to equip jade:
1) with Endless Walk set as I explained in this guide;
2) putting Convention of Elements and go with Hellfire Amulet (and Swampland Attunement passive) or Eye of Etlich, with the same build/kanai's items I indicated.
Considering that I had some very suboptimal gear in my grift 80 clear on ptr (especially the bad roll of my Compass Rose), the Endless Walk variant in end game (optimized gear, higher gems) could certainly push over grift 80 in solo!
Could you not use the Hellfire Amulet, Unity, and Ring of Royal Grandeur, with a Ring of Emptiness in the cube? Obviously the Convention of the Elements won't be present, but you don't have it present in your build regardless. Then for your helm use The Grin Reaper? You would have a defensive passive on your Hellfire Amulet (so, like you said, Swampland Atunement, or potentially even Bad Medicine since all the DoTs in this build are poison, which would be a permanent 25% damage reduction vs. the fluctuating 0-50% from the Endless Walk set). I guess that just brings into question how effective The Grin Reaper is, compared to the fluctuating 0-100% damage increase of the Endless Walk set. I don't know. Just throwing it out there as something that might be worth testing.
Wearing a Ring of Royal Grandeur (so not in the cube) means you would lose lot of damage (this ring always rolls with attack speed and life on hit, so you can't have both Critical Hit Damage and Critical Hit Chance in the roll).
I remember that (patch 2.0.5 notes): skills of jade builds (haunt/locust) calculate an average damage augmented by your critical hit chance and critical hit damage on application and apply that damage evenly over the duration of the entire dot!
So having both CHD and CHC on a ring is very important.
For example, in a ideal Compass Rose you can have both CHD, CHC and even cooldown reduction, together with socket obviously!
I don't think Grin Reaper is worth enough in a jade build, sure it can be tested, but I can already imagine that the results would not be great (the wd mimics maybe could cast haunt and locust, but I don't think they are effective on the key ability of jade set: cast soul harvest on monsters and concentrate all dots in one big damage)!
As regards defensive passives, swampland attunement > bad medicine (and the effect of bad medicine is the same of the cloud of insect rune of locust swarm)!
My bad, forgot that the RoRG rolled shit. So you'd need a perfectly rolled Ring of Emptiness, with RoRG in the cube. Same end result. Lol. But the mimics DO cast Soul Harvest. I did a bit of digging, and found this:
Q: Can the mimics cast any attack?
They will not cast any of the following attacks:
Zombie Dogs
Fetish Army
Gargantuan
Zombie Wall
Hex
Big Bad Voodoo
Locust Swarm
Firebats
(It also specifically mentions that they DO cast Soul Harvest, they just don't get the int/mana bonus portion of it)
I did some more digging and found out that the Mimics don't benefit from the Jade Harvester's set bonuses at all. I know they benefit from Helltooth set bonus, as that was changed in 2.3. Might be worth tweeting to the devs / making forums to get them to change that. If they do, it could be quite a viable build, because of the extra CC they provide with Horrify and Piranhado (plus apparently the damage bonus stacks with each of the Mimics' Piranhados) and the DPS they would give with haunt + soul harvest. The question would still remain though, would it be almost double the damage to offset the Endless Walk set? That's what would have to be tested.
With the way Jade plays I doubt you're ever going to get the full damage increase from EW anyway, it's mostly there for the damage reduction.
Another thing, it seems the mimics not proc the jade 2 pieces bonus, this means lot of damage missing on single target.
In the guide to which you are referring, there are some important things to report here too:
1) Damage of mimics is calculated based on minimum weapon damage number.
2) The Mimics will cast haunt once on a single target, the DoT seems to go away when the Mimic goes away.
3) Passives such as Vision Quest, FS, Creeping Death and Bad Medicine do not transfer to the Mimics.
So mimics, as I tested, seems (at the moment) not very effective in a jade build (or at least, not viable for very high grift)!
As a non-constant buff, convention of elements is much better (190-200% buff for 4 seconds every 16 seconds is certainly good) than mimics and with COE you can have ring of emptiness in the cube!
I do not know if they ever do uch damage outside of a canevil build. I like having all of the little buggers out for interference.