Titan Quest

Not to say that Ormenius is a difficult boss, but he can give you a light on the epic and legend. The main type of resist that will be useful to you in a battle with him is from damage to health, aka Vitality Damage (his ranged attacks deal precisely with this damage). It is quite rare to find on things, so use “demon blood” relics (shards fall from eurynoms and limos) inserted into rings, it initially has a good bonus to resistance + if you are lucky, you will receive additional resistance to health damage as a bonus from a solid relic ( collecting 5 fragments together). Rockfalls and throwing boulders cause physical damage (armor and a thick HP bar will help here, but it’s better to kite), plus the boss also summons fire elves to help.