4x War or 4x Mage are prob my next groups.

4x Feral or 4x Rogue might be fun as well. Both receiving buffs in 4.2. If you played 4X sub rogues and used hemo as your main attack you could prob still land kills with smoke bomb. The position requirement would be hard to get around for backstab/ambush. 4 x Mute or 4X combat might be viable for quick bursty kills, but if you don't get shit down quick you're done.