some more thoughts
i think your devotion build is the best in the game, not just for this build but in general for almost every build. it’s just the most effective use of points. i’m using something very similar on my CT sorcerer, though i’ve had to make a couple sacrifices to be able to use eye of the guardian. if i can get anasteria’s legendary helm to drop, and it’s as good as i imagine it to be, i’ll be able to drop eye and use what you’re using.
though i think you should consider swapping your red and green crossroads for the final two points in behemoth to allow it to self sustain. i think when you’re stacking that much health regen, 15 flat regen + 20% regen is probably better than 5% health and 15 OA.
you should also consider putting a point into BWC and its transmuter for survivability, if you don’t mind putting another skill into your rotation. the 25% reduced physical damage is really good, and from what i can tell it lasts 10s since the BWC itself will last 3.3s with your +skills, then it gets another 2s from the transmuter, and since it reapplies every second and the debuff lasts 5s.
on that note, you could maybe consider cutting blood sigil for black star of deceit, which would give you 30 resistance reduction instead of malediction’s 50, but would allow you to use a +1 brimstone ulzuin’s pyroclasm to stay at +10 brimstone. this might actually be better, despite losing 20 resist reduction. i’m not sure. the slow from malediction is really cool though.
actually it probably would be better since it would also give you +1 to static strike which frees up a ring slot as well. all those bonuses combined probably outweigh the 20 resistance reduction.
also i’ve never played a saboteur so i’m not 100% certain how much of your damage is coming from execute, but it’s worth noting that %weapon damage from fire strike stacks multiplicatively with the %weapon damage from execution. same with the weapon damage component from ulzuin’s pyroclasm, though it’s not a very big multiplier.
also ulzuin’s chestguard is probably better than empowered fanatic’s overcoat if you can find one, can roll with 6% attack speed as well, has some passable offensive bonuses, and gives you +2 to explosive and vindictive flame.
edit: actually re: your devotion setup, do you really hate the scales that much? i feel like you’d do better by dropping the 4 in panther, the 5% DA from obelisk and the 1 in blue crossroads, put 3 into scales to max it out and self sustain, then put 3 into newt for even more health regen. you’ll still end up with 8 yellow 20 blue that way, with noticeably more health regen (and a decent proc on scales) at the cost of 32 OA and 5% DA.