For a non super boss, he’s pretty stupidly brutal. I died a lot on my last summon build doing it for the first time, even on elite, even though I had no trouble in comparison killing about everything else on Ultimate(besides Gods and such).
There’s 2 main things to avoid, the pool of frost thingie and the meteors, but the meteors are hard to spot in advance and sometimes it seems he casts way more than usual at once(like 15 at the same time on the same spot, rather than the usual volleys). Problem is you can’t see much, the room is small, the tentacles slap for decent phys damage and personally I HATED how there’s chests right in the middle of the room so you end up misclicking them and not moving.
Honestly I wouldn’t bother on HC, there’s no really special rewards, just a one shot chest like any other. It’s just too easy to die instantly to meteors falling all on one spot, happened a bunch of times even with DA high enough for 0% crit and 86%resists.
Max cold, poison, and acid resistance.
Use force move to help avoid going where you don’t want to go.
I strongly suggest playing through the entire game in softcore - taking your time - so you can learn how each boss works.
Seeing a video helps, but there is no substitute for playing through the fight yourself.
Hes does quite a bit of Cold for sure. And if im not mistaken the Mod i got both kills ive did (In garbage gear) i noticed he has 60% Crit mod. Meaning you definutly want to have good DA. Id say 2500+. Low DA means you get hit more, in this case if you get hit more you also get crit more and crits are where one shots come from.
First time i tried him i got destroyed. Think i was rocking some 1900 DA or some shit… Second time i come back with some new defenses… Easy peezy… Dont just stand there facetanking. Move in, Put in your Deeps, Get the fuck out. Watch his animations as well he has a pattern just like the A4 fight. Mobility Skills help a ton here. I happen to run 2 movement skills so this works well for me. With good DA+Armour it makes the difference in the fight being a nightmare and it being just as easy as the A4 fight.