You can, but it won’t be consistent in certain situations. The advantage of using Devastation is once you cast it, it’ll be dealing damage continuously for its duration regardless of whether or not you’ve been hit by any crowd control abilities, run out of mana, or kited away. So long as Devastation is hitting stuff you’re potentially leeching health. If I’m not mistaken, GD uses different ADCTH coefficients for different skills. If you don’t have enough ADCTH the skill won’t give any health. I’m not sure what the coefficient is for Devastation though, so I don’t know if my build from the OP actually gets any health from Devastation. (though I’m fairly certain it does steal health with Devastation when Ghoul is active)
EDIT: Did some reading, ADCTH only works with skills that have a % weapon damage component to their damage. So both AAR and Devastation will never steal any health. Callidor’s Tempest does, however.
Why? Ghoul is one of the best defensive devotions in the game. The only reason I can think of for anyone to dislike it is if they didn’t like circuit breakers. (Circuit Breakers are skills that activate when your health falls below a certain point). But that’s illogical because circuit breakers work assuming your character isn’t so squishy they die in one hit. If you’re dying in one hit you need more DA/health/resistances.
EDIT: Because you don’t have any skills to sustain with Ghoul is actually a poor choice for your build, asides from the % physical resist. I would say that you shouldn’t use AAR at all then, because I don’t think this build can work without sustain.
The only stats that change are increased energy cost (+10 energy cost per level), and increased damage reflected (+15% per level). As I said in my previous post, damage reflection will pretty much never be a significant damage source (certainly not with this build). The only thing we need from Mirror of Ereoctes is the minimum skill recharge time (which is 18 seconds at level 12).
hehe yes my player die in almost one hit But maybe Ghoul is good for another players. Them should have do game more easy understand so all damage give health back.
I was think when im use that Mirror of Ereoctes so be that 90% more damage go back to enemy but maybe not so much damge you have right. Most important is have that 3 seconds in safe =)
I tried Ravager earlier tonight, and I don’t see this build working very well against him. If I kite him for the entire fight I could probably do it, but facetanking is probably out of the question. The biggest problem is getting regular crits against him, he debuffs your OA for -300.
But everything you say no like 
