Im currently using 4 shamans + 1 pally. I used RAF to level 5 shamans as a pally just stands about usually when levelling. I levelled the pally up using RAF at 60. For questing the pally doesnt do much but really helps a ton for those nice quest lines which end up with killing an elite. Instance wise the pally is excellent. A tankadin with the buffs they bring. I havent regretted this set up at all and instancing has been great.