Res is not important when you have Blood Oath. I 99'd with negative fire res and never had elemental damage issues. I guess Flickering would be good for a fire lock, but you're not gonna need thunder maul str for that tho.
You can get away with bad res because the build is broken.
Doesn’t mean it’s good.
BO makes you tanky vs phys.
Res still matters vs actual threats.
You’re just not getting hit.