The good thing is the combo of Merkabah + Possession to make sure Merkabah hit the targets.
Krivis c1 and c2 at rank 3-4 are not worth imo. So you should choose one between Divine Might or Diano and get it at rank 2.
Other things is too much for me to type here. I want to give you a couple of examples and then you should decide by yourself.
First, I want to make Kabbalist build with Merkabah, so I will make Int build. And I also like the combo of Merkabah + Possession that mean I have to build around Sadhu. For Sadhu’s Out of Body, I focus on Safety Zone and Fade but ignore Cure (one of the most offensive spell for Cleric) because I have potential damage output from my later rank.
(Honestly, I just put Kabbalist on Top of Sadhu-Druid build ;p)
Second, I want to show the opposite of the first by getting rid of Merkabah. This idea is to make physical attacker Kabbalist and focus on Kabbalist’s utility skills.