Uliana monk is my favorite playstyle but it needs some versatility. It needs both toughness, damage and most important imo, options. I like the current set bonuses in form but the numbers need to be modified.
Damage is easy, all they need to do is to increase the set bonus and/or corresponding gear bonuses.
Toughness can be added with a built in DR like several other sets have but the belt Binding of the Lost Gods needs to be tweaked to not overwrite the stack count when you SSS and it should automatically go to max stack count against elites and RG.
Versatility is a bit harder but it can be done. As far as EP choice, if they were to buff the DoT of the non cold runes by a bit and recode EP so that detonations consume all remaining DoT damage, then Impending Doom would not be the ONLY viable rune to use. I wouldn’t mind if all the runes had the same damage when DoT and explosion were combined and they could add a freeze to a radius of Impending Doom since that rune currently sacrifices a DoT to have the most damaging explosion. Choice of SSS is a little bit harder. Since the build is a CDR based build, the rune with the lowest cooldown is the obvious choice, My suggestion is to lower the cooldown on ALL of the runes (Cold should be on a longer cooldown since it is free) but change the physical Sustained Attack rune so that it drains ALL of your Spirit to perform a chain of SSS actions with 1 additional SSS for every 75 Spirit drained. That would incentivize you to a cycle of generate spirit to perform a big SSS attack or just enough during cooldown to perform a single SSS. If using the other non-cold runes, you get their various effects and if you use Pandemonium, you have to wait longer between SSS but it costs nothing and freezes targets.
The Fist of Az’Turasq NEEDS to have it affect ALL EP damage, not just the explosions. That current power is one of the reasons that Impending Doom is the only rune ever used, all the other runes do less damage and a portion of their damage is not affected by Fist of Az’Turasq.
They need to “fix” Mythic Rhythm. There needs to be a visual indicator that the passive is in effect and there also needs to be a way to identify if an EP on a target is affected by MR. The current way of snapshotting MR is an extremely difficult way to play to get the most out of the set. The 2pc should apply MR to all of the EP’s that it procs if you have the passive (and it would basically be mandatory if it did that!). Not sure how feasible that is but SOMETHING needs to be done.
A lazy but easy fix to give a semblance of versatility would be to add “SSS gains all runes” into the current 4 piece bonus, but I’d rather the devs do something a little different.