1st off all palas can heal tank and dps(not rly good tho)
if rogues are good  they wont hit by single spell if one and not all of them waste kick on interupt water elementals aint hard just adrenalin rush evasion clos bit = killed
and it is very posible just sneak to him somehow (some mobs got detect)
or get raid to clean trash and then rogues come in
i will try it on Lightnigns Blade

And yes, pallies, like druids, rock for versatility.  The pally dpsers were shockadins, so not bad dps at all.  And they were all very overgeared for Kara, lol.  I'd love to see an all druid group clear Kara as well. There is a great video of a balance (Panzer specced) druid tanking Prince in moonkin form.  It's awesome. 

Please do update us on the rogue attempt on Aran :) 

10 pallys... How about an AV team? I've seen a dirty human pally survive for like 5 mins with 10 hordies wailing on em...