Blight league issues, unkillable monsters and minion crashes.

This is my second build this league. I had to quit playing my first one due to catastrophic performance issues.

My leaguestarter (soulwrest necromancer) had such atrocious FPS and latency problems (including crashes that deleted my portals and setting back my atlas progress) that I created a new character.

No, it's not a config/setup issue, I've played for years with perfectly acceptable performance (+144Hz 1440p) and my current rig is an overclocked 1950x threadripper with an evga GTX 1080 FTW. I suspect that the additional minions+monsters are causing issues maybe? No idea. I just want it to end. It sucked all the fun out of my league start, and prompted me to make a new build; this time it's a self-cast dual void battery assassin (using orb of storms presently).

I thought that avoiding minions would help the performance, and it has alleviated the issues a little (though not completely).
Finally get through maps, uber lab, all my skill quests, etc. I start mapping, everything's alright, then decide it'd be fun to actually play the league mechanic, and this is what happens... tons of unkillable blight monsters. Awesome. I hope this is fixed.

I love the game, and can't really give GGG that hard of a time for such an incredible free-to-play game (that I overall LOVE and am happy to spend money on), but it sure would be great to be able to play the game without it catching fire and imploding randomly.

Lagzilla is the Endgame boss of blight league. nothing better than some spicey immortal Rhoas to keep your butt clenched