What should my primary and secondary mods be for HK47?

I deck mine out with 4 crit damage mods, and 2 crit chance mods. With those he can crit for 12k with offense up. I've made sure to get enough speed secondaries so that all my droids go at the same time (I think he is a 161), so he has a chance to go ahead of IG88.

I've also given him a potency cross and enough potency secondaries to get him to 63% potency which is enough to get his debuffs to stick fairly regularly.