Seat fill. Use the AQP Volumes on Comply to find out what the LOE will be. It's a line flight, Cat II missed approach, some control surface failure that will fail the AP, diversion, and a hand flown ILS/GPS approach. There's really not much to it. Once the AP fails, you're hand flying and nothing else. From that point forward, the seat fill does everything. Runs the QRH, communicates with ATC, programs the MCDU, sets heading bugs, briefs the approach, gets landing numbers, etc. Just know what needs to happen and tell them to do it. They're not going to play dumb, but they can't just take the reigns and do everything.