well actually dont know,just to give u a idea:
2h - hight damage low defence
DA - moderate damage moderate defence
1h - low damage hight defence
IMO 2h/cleric cuz cleric increase the defence
1h/warlock cuz increase attack
with DA i dont know much about it, they have a pasive similar to holy word so its hard to give them bad status, but also theyr defence is not the best, then maybe sub cleric well be nive with DA.
as i said i dont know much about DA <.<
here is a video of DA/warlock (it looks pretty nice...dunno if the vid still work)
http://www.youtube.com/watch?v=9SU_d6MtBB0