What's your plan for shadowlands?

[Undeadlord]

As far as composition: If you have never done M+ as a multiboxer (and that is your goal), I would not advice you to start with a melee comp as they are a lot harder then ranged/trinity comps. Interact with Target can bug out causing your characters to run all over the place and it is a lot harder to move them out of stuff individually then it is for ranged since there is more clutter around the boss.

Starfall does a good amount of damage and the rotation is pretty stale so we could be able to macro it with output close to a normal player.

Interact with target works perfectly in classic with the move forward command added to it, can this break in retail?

It is weird that you consider melee teams harder since melee classes are meant to be close to the tank and they can dps while moving so they should be simpler to play but I probably underestimate the mechanics of retail. I don't know what kind of abilities/playstyle deal with well with such complex mechanics.

Can you macro moonkin rotation? iirc it wasn't easy to macro at bfa.

Anyway, thanks for the long and detailed answer, it is very helpful.

Interesting thoughts so far, most are talking about mythic+ and gathering so I suppose that's the two main things to multibox in retail. It seems raids or WPVP comes second and everything else is probably too casual. I like the fact that everyone takes seriously the m+ grind, I thought it was too hard for a multiboxer. I hope I will be able to sell boosts as a multiboxer.