Well, I want to maximize my use of Smart, so I'll definitely be using Light.
Of course I also want to play with the big guns... so I'll have a couple Heavies...
and then I will also want to do some shotgun work with Smart, so Medium will be required.
For classes I love tactical defense set ups... so Engineer will be a must for me... first choice when defending for sure.
Infinite ammo and super grenades sounds fun, so I'll take a roll at assault.....
Self rez, easy points, and keeping a team up is priceless... so I will need to use medic sometimes...
and of course, Spy vs Spy is a game unto it's own, so I will also be lovin me som Op Work
I guess I'll prolly play some kind of combination involving everything above