IMO, pallies are better because they can heal, have a lot of armor, and they aren't Dependant on a pet, so they're less likely to be chain-killed by NPCs.
i dont want to sound like a know it all but i have tested 3 accounts on gb a lock,pally and warrior , and the pally will pass by alot of nodes because hes soo fast and the slow and steady lock or warrior out did the pally every night in my case at least count of ores