I was given a similar scenario on a CRM/MCC course at CTC Dibden in 2000.
Ours was thus: Landing at Bristol in a 737 with flaps limited due to hydralic fault. Captain pilot flying, runway too short with malfunction increment but Captain determined to land anyway with no discussion of alternatives. What to do?
After much deliberation we resolved to make strenuous representations to the Captain to divert but if he would not agree then to back him up on the controls on the landing roll.
This course of action was endorsed by our instructors.