5 Ele shamans are pretty good. I'm only at level 22 atm. (We can't level, like we used to, family, work, etc) I did clear RFC at 18, and WC at 22. If you want to enter any dungeon, make sure you higher few levels. I'm also working on second team 1 priest 4 warlocks, love that combo so far!...

As far leveling in Classic, it takes time, for example : some people hit 60 all ready on single toon, as they played pretty much non stop and slept only 4 hours a day. I'm thinking a 5 man team would take few weeks. The more chars you box the more time it takes as you have to collect quest items on each toon, not so many Slain quests out there. It's a bit of a grind. level 30? that's pretty damn good!