Hi people! I think I'm almost ready to start dungeon crawling with my toons, but I'm wondering if my group composition is viable or if I should spend some time leveling up a different class on one or more accounts.

My group is:

85 Prot pally
85 and 83 arcane mage
83 assassination rogue
81 holy priest

I'm mostly wondering about the rogue in there, whether it's easy enough to have him attack while having the casters hang back. I can if absolutely necessary move another 85 mage from the prot pally account to the rogues account, but I would like to hear some opinions on this group first. I have never run a dungeon multi-boxing (other than PLing of course) and I have yet to ever even run a single Cata dungeon. As soon as I hit post, I'm going to start setting up the group and hey, if I don't get any replies between now and the start of the first dungeon, I guess I'll find out myself! Thanks for any replies!