[Mod] Reign of Terror

Is this intended to look like this?
Im playing on 4K with the UI at 1.125 and 1.0 same issue.

Also want to say this is one of the best mods ive seen of any game in a long time. Top 10 best mods of all time.
Having said that, there are some things that confuse me. Like the boss level mobs you see in some areas:

Ive seen a about 4-6 of them so far upto Act 3 now. Its a cool idea. I have had no issue with any of the content so far, and bosses like Andariel/Duriel were a challenge but were doable. However I have not been able to even get past 5% of any of these special class(?) mobs, and its usually only 5% because of my initial burst, then they basically heal to full and out heal my DPS?? Thats ridiculous and unfun. I dont mind slogging through 1 million HP when im level 32, but if youre also going to allow them to self heal for 40K per second, I am just going to skip them and come back later. Problem is they are likely worthless later. Whats the deal with these?