On convoys I try to get a single shot off for the largest target from 2000 yards or under in TMO. Then I can actually get the shot off, turn tail and run before the escorts swarm me. Whether the shot hits or not, this pulls the escorts to my side of the convoy.
I'm exiting out the back at high speed to cross their sterns and do the end around to the unguarded side of the convoy. When I get there there's gonna be hell to pay!