While i'm here, been using the 'Witch' setup a bit too.

Marathon
Leightweight
Commando

Primary: Vector
Secondary: Pistol

Killstreak: Care Package

You basically run around like some phetted up crack monkey stabbing everyone, when you get care package, get the flare out as your primary, you run mental quick with the flare out making you Mr Stabby McStabhappy. Repeatadly crouch on victims for extra teabagging points.