Push-up on rings — the instability hammers the chest, serratus and stabilizers and builds the straight-arm control that carries into the Planche. A free, joint-friendly press you already use.
Push-up
Cues
Rings just off the floor, body in a hard hollow line, turn the rings out at the top for extra chest + stability. Lower with control to a deep stretch.
Programming
3 × 8–15. Raise difficulty by lowering the rings / elevating the feet.