Sadhu is dead, Kabbalist is dead.
Both classes need a rework, the developers are going to rework a lot of classes this year, so you better hope those two classes are in it.
Yes, you can actually use both classes, but the problem is that there are simply other classes that do the same thing but better. Sadhu is outclassed by Exorcist and Crusader and does not offer anything to your build in contrast those those two classes (Exorcist has +20% holy damage via Gregorate and Crusader has +40% magic damage with Chant).
It’s also stuck with psychokinesis element, the worst element in the Cleric tree because it doesn’t benefit from any buffs/debuffs for any element that come from the Cleric tree or any other tree.
Meanwhile, holy property has huge boosts (mainly Capella,Judgment,Gregorate) and even fire/lightning work great (Conviction,Tri-disaster Charm,Storm Calling) with the right setup.
And we cannot forget the clunky play style of Sadhu. It’s not as bad as it once was in between, but still not really the kind of style you want to have for the once super-mobile Sadhu.
That and the damage sucks. The class is crying for Druid and Crusader to boost its output. Possession, the once most reliable AoE damage skill, is now a single target damage skill, and the other skills rely on working with OOB.
I can understand that some people like the new Sadhu, but I’m not exactly a friend of what happened to it. Maybe it will be remade somehow, but I doubt it changing much.
Kabbalist is just clunky and was nerfed into oblivion with successive updates. Don’t ever use it, there are better alternatives for whatever you’re planning to do.
If you’re looking for a healer, it’s better to go for Pardoner, he’s far more helpful for any content.