In my opinion/experience this is the second strongest and definitely one of the easiest to play DH builds for Solo Greater Rifts, although it is not incredibly consistent.
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HFA Passive = Steady Aim or Ambush
If you have survivability issues you can consider trying a few combinations of these;
Run the Leech passive for healing, this will allow you to kill reflect and recovering from taking damage much easier
Run Hunter's Wrath over Witching Hour
Run Evasive Fire Hardened over Focus for more armor
For even more toughness you can swap Convention of Elements to Elusive Ring or Unity, this will significantly weaken the build but make it that much easier to survive.
At low levels powerful usually outperforms stricken, up to around high 70s depending on player progression
If you are attempting to push your limit with the build and have a solid handle on positioning and surviving I recommend swapping Visage of Gunes to Cindercoat
swap some of the vitality/cooldown to resource reduction/area damage, specifically on the gloves/quiver/rings/shoulders
potentially swap stricken to powerful depending on how long the RG takes powerful can outperform stricken
on softcore you can consider dropping awareness for all damage passives (ballistics, steady aim, cull the weak, thrill the hunt, ambush)
Endless walks + SoJ is viable substitution for Focus and Restraint the trade-off is potentially slightly favorable toward the EW > FNR assuming optimal gameplay, so if you really want to push with UE and are experienced DH I do recommend you give this setup a shot.
swap Thrill of the Hunt to Awareness if the group is procing your slows
In group, you can also consider swapping the build to Cold, Wind Chill gives 15% crit chance to the whole group!
this will free up Ballistics for Numbing Traps (for group toughness) or Single Out (for Rift Guardian dps)
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