On the 4 minute mark for 6 rounds:
4 Deadlifts (AHAP, for as many rounds as possible, touch and go)
4-8 Strict C2B Pull-ups
Post load and any scaling

Intended Stimulus
Build to a heavy set of 4 during the warm-up.skill work. Then, hold that load for as many of the 6 rounds as you can. Tinkering up and down in load during the 6 rounds is fine, but your aim should be to be done with the big jumps in load before the 6 rounds begin. Those without at least 4 consecutive strict chest to bar pull-ups should go strict chin over bar pull-ups, and those with out at least 4 consecutive strict chin over bar pull-ups should do 5 reps of a full 5 second eccentric lower.