I'm running a simular setup soon, currently have 60 mage shaman and paladin I'm gonna level up to 70 (or close atleast) then join with my 70 druid and hunter. So I got a hunter instead of your rogue, I got it easy, you got the challange ye, I would love to try that challange.

Anywho, I agree with what peaple here are saying, what would probably work out best is paladin for tank and shaman for heal. The way I do it, and atm it's going realy well attempted to dual ramps, at 60, but died when I came to 2 casters =/ anyways, got my mage on the third acc now and just waiting for those damn servers to get back up, then I'll hopefully 3man it and damn I whon't give up easy

And for the note, I tryed to dual with my 70 feraldruid (blues and 1 or 2 epixx) and the 60 restoshaman in ramps, and it went impresivly easy =) whiped twice, first was becous autohotkey had turned of brodcasting without me noticing, so didn't get any heals in a too big pull (that dog dud before first boss + 4 moobs and the dogs, I think) so I slowly died. Secound whipe was when I accidently pulled first boss together with a pull, resulting in me figthing the first pack of 4 + boss with his 2 healers + another 4 pack. It looked veary well, until my shaman pulled agro, and me not being feraltank for 5 months didn't find the mass taunt spell in time, so she had like 3% hp when I hit it, then shortly after getting hit by aoe 0.1 sec before the healing wave landed on her =/ slooowly my druid died too. However, I got to kill 7 of the 8 in the pacs rest was a walk in the park. Tank and spank all pacs, first boss just killing healers, stunning when they try heal, secound just tank and spank basicly, jump on the dogs when they spown (they take 3 hits from the druid) and make sure not to stand too close so the curse wasn't even noticable. Last boss was a bit worse, keeping an eye out for the fires, but just looking back and forth between the screens every 2 sec and I managed to move and heal the shaman all the times 2 of 4 drops was usefull for the shaman even don't remember which. The 2 others became two small shards
A bit offtopic, but just felt like bragging about me succsefully multiboxing an instance in the right way, all controlled from the main window ^^

(if anyone is intrested in some things about my setup, feel free to drop me a pm or mail me at mordee@live.com, I'll share anything from playstile, lvling, HKN script etc )

A small tip for you, for something I'm gonna try soon, is a melee team; feral druid tanking, retripala, enhshaman and the rogue sure, teh mage whon't be melee, and you whon't have healer, but the challange of this sounds awasome I'm gonna try with my druid pala and shaman atleast

Last note about which to do what: I belive trying them all is a good idea too. Maybe start out with what most say is best/easyest, but after a while try something new, tank with the druid and heal with the pala instead, or heal with druid and pala tank change is healthy, and then you might end up when trying one of those the "a-HA" and know exactly what to do, either becous it works out so well, or becous it's incredible fun

Good luck further with the boxing ^^