>>31297382I had success with
leftovers
Adamant
4hp 252atk 252spdef
Power Up Punch/Superpower
Leech Life (to keep the power ups going)
Poison Jab
Earthquake
I have had an argument over what item is better, assault vest or leftovers. But it depends on what you swithch in on. I find leftovers is better when you swap into a bulky physical, because you can use them for power up punches. But if you're not running that go with assault vest.
Honestly though loads of sets work because of the diverse movepool. Has roost too if you wanna go the bulk up route.