User:Spaphrenchie/Dancing Queen

Class Mods
Depending on play-style, either a Mercenary mod with a high SMG damage modifier or a Catalyst mod with a high cooldown reduction should do nicely.

Grenade Mods
This really doesn't matter. Transfusion is nice for solo, or when you don't have a Medic/Survivor/Centurion along. Otherwise, pick your favorite type of grenade mod with an element that suits the situation.