Belly Drum Azumarill has been a big pain in my ass with his priority. So I want to one up him and use something similar but more annoying.

How does Sturdy Carracosta holding Weakness Policy and using Shell Smash and Aqua Jet sound?

Any other Pokemon with a STAB priority move that can survive a Super Effective hit to activate Weakness Policy and boost using a move that first turn?

Mega Pinsir is close but there is no guarantee he will survive a Super Effective hit.