Alright so I am a little slow but have decided to give the B3 another shot. It has been okay for me to this point, but I was thinking of mixing it with the Lancer. Provide a nice 1-2 punch from range and melee. I like the DR on the B3 for the purpose of Pawn of the Darkside, with DR it ignores the damage so Pawn is fesable more often, and on a ranged character with triple twin, it is likely to connect on plenty of occasions and evade is only 50/50, so...

Grevious DAC
Sidious
B3
Lancer
Gha (an auto include in droid heavy squads, and his heal 10 is nice for a lancer returning after being pawned)
BDO
R7 (cheap override with higher defense for greater survivablilty)
x4 BD
X2 Uggies

13 activations is a decent number, and it has plenty of minor threats and a couple of big ones, the lancer is the obvious one.