You can go:
Cleric 3 -> Inqui : This would be the best build for killing bosses. Heal 15 + Cure 15 deals nice damage and Inqui Wheel + Malleus + Blessing makes even badly geared characters very strong. Remember you can spread auto-atks with Breaking Wheel and all your extra hit lines counts as only 1 hit.
PD2 : Best build for AoE damage, Black Death is very strong but you won’t be the best dps build for PD2. Sadhu 3 PD 2 is a lot stronger though it has no Blessing to buff allies. Blessing is very strong during most of the game but once you start transcending weapon it becomes much less valuable.
Miko -> Inqui : Similar to first build but Kagura buffs Breaking Wheel and melee allies for +60% damage (with Divine Might) with both skills and auto atks (but you can’t do anything while casting it). Hamaya also deals nice damage and would somewhat even out with the lack of Heal 15 and Cure 15.
I wouldn’t recommend Taoist because it performs much better with Sadhu 3 and/or INT builds. Some people like to pick Taoist in support builds for Dark Sight alone but I think it’s unecessary.
I wouldn’t take Kabbalist 2 as it’s a pretty bad class for pvm. However, if you’re a pvp player then it’s pretty powerful (and sorta lame).