So I managed to make a purge spawn (had to remove all doors and have a “base” with open walls???)
I may have put too much gold in the coffer though?
The rate at which assailants spawn is extremely high 
There were so many bombers, who throw demon-fire orbs at you without ever missing, and you cannot sidestep 
The attackers summoned are uh… I got some Kithan dudes first, and then when re-starting some naked prisoners, and then some Stygian raiders, all on maximum difficulty, sounds very clunky.
Also, maybe the hyper-armor change is (once again) unpolished, because it seems like enemies benefit from much more hyper-armor than players This might just be an impression though.
→ The Hyper-Armor has been removed from the Katana’s dash (or at least the charging animation) altogether, which is a massive nerf to it 
All in all, this new purge seems terrible, first because it is loaded with artificial difficulty and unfairness (tune down the spawn-rate at the very least my dudes), but also because there is no finesse to it whatsoever.
It is just bruteforce from the Stygian, and you just need to click harder than them with massive numbers (Brimstone Golems are recommended)
The difficulty of the purge is determined by 4 things:
• How many assailants there are (including the respawn-rate)
• How much damage they deal
• How much damage they can take
• Which proportion of them have unavoidable homing AoE attacks (demon-fire orbs)
→ On this last point, they do damage themselves, but the respawn rate is so high that it doesn’t matter if they die.
I still managed to defeat a lvl 10 Purge after a few tries, and there was nothing worth the pain… And I say “pain” because it was long and boring, I can’t count how many “waves” there were, it took super long, it was uninteresting, it was repetitive, I couldn’t see the fun in it at all…
And, that’s if you even manage to make a purge spawn, and for it to not despawn because they suddenly decided your coffer is out of reach (my first attempt was like this)