What should my primary and secondary mods be for HK47?

I've got him decked in all crit-chance ones right now, but I'm gonna switch him over to potency ones to test it out. He's got a fairly low crit-chance compared to most of the other droids, which exacerbates his speed problems when he can't get his leader effect on basics. However, his main uses are his leader and his debuff potential, so potency is a good stat to get on him.

As has been said, tanky mods aren't necessary for him. He can survive plenty long with his base defence stats, and he's got a high-chance revive if things go bad.

Also, don't bother with any damage-oriented ones on him. He's not going to do much, even if you stack offence and crit-damage mods.