Warrior warlock makes for one of the best damage dealers. You can debuff people and destroy them when debuffed.
-Moreover, warrior warlocks can stun lock people
-a GOOD warrior warlock CAN shutdown a warrior cleric via Disease and stun then go into dare devil and stun again and dare devil.
-Can use robes which helps against nukers
Downsides of the warrior warlock are lack of heals and defense, think about making a glass canon (sorta)
Warrior Clerics are great for tankers and in the right hands, can be deadly.
-Massive heals to themselves and team mates
-Can run the following skill while in 2h mode: Recover/holy recovery division, blessed spelled, holy spell, (prevents statuses like poison but does NOT prevent stuns or disease status) and finally be able to have healing orbit on.
Cons of the warrior/cleric is lack of stuns and debuffs to really take down other players fast like the warrior warlock.
Choice is yours, those are the two most used and most viable class combination out there, just make sure if your using both, please don't be an idiot and put points into int.
PURE STR FTW.