5 Chars Dungeon Powerleveling Multibox

[Apatheist]

I would not want to stance dance across characters like that.

You macro stances into abilities so you don't really have to actively manage stances.

#showtooltip Overpower
/cast battle stance
/cast Overpower

As for spec, I've gone back and forth between 2H fury and arms and settled on arms. It's just easier. Bigger cleaves with a 2H and only having to keep one weapon per warrior up to date is much easier to do while leveling. At 60 with enough hit rating I'll switch to DW fury.

The difficult part with warriors will be figuring out a system to manage rage efficiently.

I definitely would not recommend a spell cleave dungeon grind group, if that spell cleave is mages. Shadowpriests? Yes. Druids? Maybe. Elemental shamans? Yes. Warlocks? Yes. Mages? They have the greatest potential, but also require the most actual skill input to make it work.

My experience is the exact opposite of this. Mages are literally the easiest DPS class to box in classic. Both their single target and AE rotations are 1 button and very mana efficient. With a good AE tank (see: paladin) you run in, pull 10-20 mobs, drop consecrate and then spam arcane explosion. It's dead fast and easy. Then later on in 55+ dungeons where you can no longer pull a ton, you get polymorph and frost nova which are great tools for reducing incoming damage on your tank.

The primary reason I decided on warriors rather than mages is because I PvP a lot. Mages are great solo but require too much micro to PvP efficiently while boxed.