Not your usual toon question

[Hottbiscuits Dreadmuffin]

I think I get what you're asking. You want to know if there are classes that are beneficial to have more than one of in a group, yes?

Rogues, Monks, Necromancers, Mages would be on the top of my list. Necromancers for sure especially if you can't find any Bards or Chanters.

Starie prepares to cast Divine Aura. I think Rangers are underestimated. Starie casts Divine Aura and flees.

They do great DPS and are good ghetto crowd control.