Edit: I've been frequently updating the guide as I feel like something is needed to be added. You might see something different compared to the last time you checked this guide.
Since im a new player I don't know a lot about builds and classes so I only mentioned the fast builds that I know of. Feel free to mention about the missing builds or if you have a better one. These builds are made by other players.
The core items you need in Chicken and Danetta DH are only main and off hand weapons so they are the easiest to start farming with.
Hello everyone. After 12+ hours of farming of RBG's for 15days in a row and 304 portals, I finally got them and I have been noting down most of the goblin's locations as I wanted to share the stats, and my/our rotation to help people who has been farming/wants to farm. I will try to make this guide as brief as possible. This is the first time I'm making a guide so please pardon me if it looks not well made.
Some Information about Princess Lilian, Whimsydale and Rainbow Goblins
I would like to correct a common mistake first, Princess Lilian spawns from another unique monster pool. (Tubbers, Nightmarity, Team unicorn, Princess Stardust, etc.) You will always see Super Awesome Cake or Evil Oliver in Whimsydale. Lilian will spawn as an extra, the 2nd unique mob. She DOES NOTspawn instead of Evil Oliver or Super Awesome Cake.
The difficulty does not matter. It won't affect Princess Lilian's or RGB's spawn chance. I farmed on normal difficulty.
It took 304 portals for me, so approximately %0,3 chance of Princess Lilian spawn chance, atleast for my journey. But remember, its all RNG, It can take just a few portals for you, or more than me (hopefully won't).
As you can see, Princess Lilian looks different from the other ponies. Only 1 other mob looks excatly the same as her, Princess Stardust (I really hope that never happens to you ) which is another irrelevant extra unique might spawn from the 2nd unique mob pool.
This is how would you see a Rainbow Goblinon the minimap and while it is sitting at somewhere. %80 of the time it sits and wait to be found at somewhere, channeling the portal. Sometimes it jumps out of the portal out of no where when you get close to its location. If you want to share it with someone not in the party, you have to keep your distance to RGB and invite others. If you get too close to it, even if you don't attack, it will start running around and you have to kill it before it escapes. Remember %85 of the time you will hear it's sqeuaking sound before you see it. All of the goblins makes the same sound, expect the blue one (don't waste time to kill it) has a deeper voice.
You don't need to be in the map which the Rainbow Goblin was killed in, being in the same party is enough. You can still teleport to the player who killed it and get in to the Whimsydale portal.
Rainbow Goblin(CAN't spawn via a bandit shrine) spawn chance is around %3-4 from what I have observed. But remember, it's all RNG. Upon its death, he will make a portal to Whimsydale (not Whimsyshire) where Lilian can possibly spawn. Only the people who were in the same party when RBG got killed can access to the Whimsydale. You can only find her in Whimsydale. Once you get in to Whimsydale, make sure you check every single corner. She can spawn even next to Oliver / Cake.
Only 1 Whimsydale can occur in one game. Killing more than 1 RBG's in the same game will teleport you to the same Whimsydale. So once you kill a RBG and clear Whimsydale reset the game.
IMPORTANT !!!!!Make sure everyone gets in to Whimsydale at the same time, if someone kills Princess Lilian before you get in, you won't get the wings. She can spawn right in front of the portal you enter. !!!!!
Farming for RBG's can be discouraging. Don't get demotivated if you can't find RBG for a while. I had many instances that almost 2 hours of no RBG even though we were actively farming for it as 4 people. But sometimes we found 2-3-4 times in a row. We even found 8 times in a row, but that was extreme luck. You will eventually find one, just keep farming efficiently.
If you already made up your mind, don't give up ! I knew if I gave up I would never get my wings. I've tracked and noted the goblins to keep myself motivated and share with other farmers to help them a bit. Consistent farming might get extremly boring and it is not suitable for everyone. You don't have to farm like me, take breaks whenever you feel fatigued or bored. I also took those breaks but tried to keep them to minimum.
- Lower & mute any volume EXCEPT Effects and Master Volume. Most of the time goblins makes a squeaking sound before you are able to see them. This is very important, I have found many RBG's without seeing them at first.
It is THE MOST important thing in farming RBG. You and your party should not waste a minute while hunting. Don't waste time on killing/looting mobs or any other goblin except rainbow.
-Join "Rainbow Goblin" "Rainbow Goblin Farm" "Farm Cosmic Wings""CosmicWings Season"and other active communities to find people for farming together. ( I have just created one, called RBG Hunting if you would like to join)
-Do not allow any leechers in your party, make sure everyone has a speed build (chicked WD, dash monk, etc.) Always try to farm as a group, the more people you have in your group the more Rgb you will find.
-The slowest member should take the shortest act, (a3 or a5), act1 for the fastest member. Your clear time of your party for the maps I will share down below should not take more than 6-7 minutes. If its taking any longer, someone is leeching, does not have a speed build or trying to explore the whole map which is a big mistake.
-After everyone finishes their acts, each member should type "Done + act". Once everyone is done, type "new game" so everyone logs out for reset. Reseting fast is another important element of efficiency.
-If you find a goblin in any map except than P.Fortress level 1 and 2, go to the next map because except those 2 the maps in your rotation will never contain a second goblin.2.The Acts & RotationSome zones has much higher chance to spawn a goblin compared to the others. You and your group should only search them. I will only mention those maps/acts.
If you are solo farming, I suggest checking the total Rainbow Goblin stats down below and making a route including only the maps that had high amount of rgb's. For example I found 49 goblins in 50 minutes only doing Act 5 rotation. The more goblin you find, the higher chance of encountering a RBG.
Sorry for my long loading screens, FPS drops and navigation errors. You can do much better than me.
Nice guide, I'm sure it will be helpful for those still looking. At first I was like "that's excessive use of color" but then I realized... you kept the guide in rainbow color style.
Just two points from my personal experience to add:
1) I did not farm on Normal, but T6 or so. The reason being that if I accidentally engage a RBG (happens really often if you're quick, like with a dash monk who gets through some maps in 2-3 seconds with perma dash) I can poke it every few seconds and prevent it from despawning while inviting other people (and not insta-kill it as on Normal). Of course that only makes sense if you have separate games open and not all 4 of you are looking for RBGs in one game.
2) You might want to clarify very clearly that it's sufficient to be in the party, you don't need to be in the *area* when the goblin is killed. So if you're farming in different games, invite people, and have already engaged the goblin, as soon as the people have entered your game they should be able to get into the portal, even if they're still standing in town. There are lots of people who think you need to be there when the goblin is killed.
As for the goblin spawn chances on certain maps, I'm not so sure about that. I remember seeing lots of different data from different people, but the reason that some areas always pull ahead (like Cave of the Blood Clan or whatever it's called and Leoric's Passage) might be a self-fulfilling prophecy: rumors are it has higher chance to spawn goblins, so more people check it more frequently and more thoroughly, and find more goblins there... rinse repeat. Therefore I'd just pick areas that you like to traverse and most importantly you're very very fast going through (if you often run into dead ends in caves just switch it up, because as you said, efficiency is key). For example, I liked all the tower maps because they're static and with dash/teleport you can make some shortcuts and check 4 individual maps super quickly.
The thing with seperate game farming is you need 3 other people who you completely trust because if someone is slacking it won't be efficient. And yes you can interrupt goblins escape but only up to a certain time. Its portal becomes uninterruptable after 40-50seconds you engage him which is a enough time for others to join you. That strategy might be better but everyone must be doing their part, most of the time %50 of my party used to be random pugs that's why I sticked to same game farming.
About the maps, for example the Arreat core in act3, had a very low chance of spawning goblins. I found atleast x5 more goblins in leoric's passage compared to Arreat Core and there are a few more examples like that, atleast regarding my experience. It might be different for everyone.
And thanks for the point about people who thinks they must be in the area when rgb is killed, I will add that the guide.
Very nice guide, I wish it had been already available when I was looking for the wings! I was relatively lucky as I found them after only a week of farming and about 50 rainbow gobs. I used a WD chicken as most people do. I invited 3 friends to that portal, who now owe me forever :-) I was so happy when I got the wings, I couldn't believe it! They fit perfectly with an Archon wizard and are also nice on a Demon Hunter. I would not recommend them on a Barbarian though