Oh man thats a good idea. Like, get a racing footpad thing with 3 or 4 pedals, have each pedal assigned to a modifier (alt shift etc) ... brilliant!

as for the op, i have no idea. I'm going to be struggling with that myself here in a few hours. 2 shaman - 2 paladin team ATM at level 28. I have 2 level 70 shamans, and plan to do 3 shamans 1 paladin in the long run at 80... not too sure how its going to work out. Will probably make paladin the main. All shamans really need to have is 4 buttons (basically)

lightning bolt, earth shock, frost shock, chain lightning

Could add t-storm in there too I guess

Then the paladin just needs... paladin goodness to hold argo!