What curses do you rely on?
Look, I am not a summon necro lover, but then your armor looks like you want your enemies to take additional damage when they attack... so then I COULD (not would) assume you use the Iron Maiden curse to make them take more damage (physical) and maybe Corpse Explosion dealing both Physical & Fire damage.
Now to reduce their defense it seems you have an infinity Iron Golem, which is great... it complements Iron Golem, Thorns and CE for the physical aspect since most monsters in hell difficulty have fire immunity.
I don't know what you are wanting to achieve with your build, or how you play the game... people use Amp... I like to use that skill, but maybe Iron Maiden is something you may want to use even @ 1 base skill point during your climb.