3-4 Over Sting Pinch Zone is a very popular blitz, I've seen a lot of different setups for it. 3-4 Stack is underrated, I like to put the DEs in Contain and blitz the OLBs, user the MLB, and I can stop the run with that. One of the things I like about 3-4 is that you can pretty much make any of the 3-4 formations into another by shifting/spreading your LBs and D-Line. I've always like the Cover 2 Sink plays, sometimes I'll put a few of the hook zones into flats or purples.