Get upside down every single day. Even if it is on the job.

Helipads are always fair game.

Flexibility
PVC Shoulder Raises 3×8 DEMO

Skills and Drills
4×2 Arch to Hollow Swing + Chest to Bar + Muscle-Up DEMO
Treat this as a complex, connecting the muscle-up into an immediate swing. Substitute the muscle-up with an additional chest to bar pull-up if necessary.