+1 Outrage Salamence + dragon jem -> defensive slowbro (85.27 - 100.5%) -- 6.25% chance to OHKO (81.25% chance to OHKO after Stealth Rock)
Not bad, although, yeah, you need rocks up. There also comes the issue of locking yourself into outrage, which makes you very easily revenged.
I am not Scarf Wynaut on Pokemon Showdown. I am PrincesoBubblegum