Good 5 man comps purely for pve / dungeon leveling

[zehedas]

Hi all.

I'm new to multiboxing in classic and trying to decide on a comp. I play on PvE server and have no interest in PvP whatsoever so I'm mostly looking for something that is efficient to level by dungeon grinding, and not overly difficult to play. From what I've understood, warrior/mage/shaman/priest teams are generally considered good. Currently I'm looking at these alternatives:
4 warriors / 1 shaman
4 shamans / 1 warrior
4 mages / 1 priest
3 mages / 1 warrior / 1 priest
3 mages / 1 paladin / 1 priest

Which of these would you recommend for a multiboxing newbie? Are there other alternatives I should be consider?

Are there any faction differences in regards to multiboxing I should consider?

Thank you!