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.

Try to get him fast enough to fill on recalibrate. It's a challenge (the dude is slooowww) but worth it if you can do it. If there's at least a chance that HK can aoe before 88, it's a nice plus.

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.

With the wiggs, Meta I have made HK go slower than 86 and 88. Even with out critical chance mods he crits very often.

1 Crit damage (with potency secondary )
2 potency
3 speed (he's so slow)

He's tanky no need for health or protection. Crit damage is great since a droid team under his lead has good crit chance. Potency is key as you always want him to stick debuffs. I go back and forth between a speed arrow and an accuracy arrow. He's so slow even the extra 30 doesn't do much.

I just want to emphasize that speeding up HK is not about making him "fast" -- he will never fit anyone's definition of speedy. It's about making him fast enough so that his tm fills to 100% on recalibrate. If you are not 80 yet and cannot omega recalibrate, then you might need a lot of speed to get HK to fill. The speed of your JE matters so you'll need to do a little math to see how fast your HK needs to be. U want HK, 86, and 88 to all go before a speedy Biggs or STH. Whether to single target attack or aoe will depend on the context, but you at least want that choice.

Unlike 88, potency is not really an issue for HK. Once you put the scanner on him at G9, he has a 39% base potency. Almost no one mods for tenacity, especially people running rebel teams. So that is more than enough potency to get your debuffs to stick. If they are getting resisted, it's more likely that you got tripped up by the minimum 15% chance to resist rather than anything else.

Imo, ideal mods are crit damage and crit chance set, with a crit damage triangle and speed arrow. Basically, the same way you would mod 88 and 86. I've done the math and so have others, and your expected damage is better off with a crit damage boost once you cross the 40% crit chance threshold -- a given with HK's leader ability.

You want as many speed secondaries as possible. Crit chance secondaries are also desirable. Potency on the cross is fine as insurance but not really necessary. I would not use an accuracy arrow unless you are facing a dodge team (which are pretty rare beasts in high end arena).

It's 30% crit chance bonus from lead. 50% tm on a crit with omega.

Thanks everyone!!!