In my opinion if you are a true full support:
- Cleric C2 is a must for healing
- Priest C3 is a must for stone skin (and blessing after balance update)
- Krivis C1 is a must for daino, because full support means you join a party and the party doesn’t have to worry about buffs and heals
- Going CON/SPR is a must
Chaplain is not really a full support class, it’s more of 75% support + ability to solo well class. There just isn’t room for it. Not taking Chaplain also allows you to keep Aspersion and Sacrament at level 1, so you can max Blessing and Revive instead.
In terms of PD vs. Kabbalist, I’m still undecided. Say I’m a pure PVE player and want to be true full support, what does Kabbalist bring to the table that’s really useful in terms of buffing and healing the party? Ein Sof seems to be the only party buff the class has at all and it only increases Max HP, what’s the point? Same goes for Oracle.

I’ve made my decission, i will go for Krivis