Bone Armor is good place to start, it gives 120 Armor for myself, and the alternative is inferior (Intelligence doesn’t scale most damage over time, and if does in some skills, it only adds 4% damage per point)
Stolen Vitality gives 120 Void, necrotic, and poison resistances. With poison resistance being very important to counter self poison damage from aura of decay and Decaying Form.
Blood Aura might be an alternative, but I have 550% increased damage over time, and 100% increased poison damage on character (plus more “increased” modifiers on each skill… 48% increased damage from 8/8 Blood Aura would only be like 5% more damage at best dream scenario.
But theory aside, I tested Blood Aura, had allocated for many levels, and when I respec it to get more Armor I felt no damage decrease. That testing on Training Doll … Same with “Three Plagues”, removing 9 points from it made me not really lose any noticeable damage.