so im clearing tier 11-15 maps pretty efficiently until I get to the boss

I take a lot of dmg and get 1 hit sometimes

im running a champion cyclone build, is there some type of defensive setup I should be running before fighting as boss?

the map clearing prior to the boss is very easy, I should have problems killing the boss without dying a few times and losing all my XP

Do you have any defensive auras? How much health do you have? Any damage reduction? Maxed resists? Etc.

Vaal Molten Shell

I just tried out molten shell and it seems to help a little

My res is max besides chaos I’m -40.

My health is at 4100 and I’m at like 100k dps 130 or so with flasks and buffs

got a golem or minions to pull ago?
i use vaal summon skeles at boss and lighting golem to pull ago

this might be a problem

do whatever the guide you are following says