Here are the 2 multibox teams I am considering for classic. One thing to note is that I plan on raiding with a warlock, so that must stay no matter what. The other thing to consider is that I plan on doing a good amount of world pvp.
Warrior (tank)
Paladin (healer)
Mage x2
Warlock

This is a great dungeon farming group, but I feel it would be a pain to manage in world pvp. I guess worst case scenario I could just dual box the pally and warrior and leave out the other 3 if it’s too much.

Or..

Mage
Warlock x3
Paladin

This is a decent farming group but not quite ideal. My biggest concern with this group is leveling time. A priest could be swapped out for a paladin for better farming, but then I lose out on a lot of pvp survivability between BoF and BoP. The frost mage would be my lead. Between blink, iceblock/ barrier and BoP/BoF it could be quite fun.

I guess it comes down to if I want to focus on pvp or dungeons. Thoughts on the 2 groups?