Speed/offense sets seem like the way to go, with potency (or maybe health for HK and whichever two generic-Sith guys you go with) in the other two slots. No point bothering with tenacity or defense since Ferocity will shoot those stats to hell. This is definitely a "best defense is a good offense" team.
Speed and either potency or health is my game plan, if I can get him. With the exception of Trooper, who will probably be all health. Secondaries of speed/offense, crit damage triangles and health crosses for Basti/DR (since they get a bonus 70% at the start, that 20% health boost becomes 34%, if I read the ability correctly).
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Plus speed.
And potency.
Speed is like always needed