Well, ANY caster build with capped resists and ADCTH (life leech) IS damn tanky when leveling. For example, cold Drain Essence build i’m playing ATM:
https://www.grimtools.com/calc/bVAA1yoV
Same could be saild about my AAR build, Forcewave, and many other builds. After all, Main Campain isnt really challenging, unless you play DW with some sort of auto-attack skill.
If we’re talking about endgame, though, it’s a completely different matter.