Diverting at 10,000 feet is very fuel inefficient, the default LRC speed for the B777 is Mach 0.84
In the event of depressurisation, the usual procedure is to descend to 10,000 ft or the MSA, whichever is higher (read the manual
). I can assure you the LRC speed at 10,000 ft is NOT M0.84. Furthermore, the distance from IGARI to WMKP is only 221 NM, a good deal of which would be taken up by the descent. Do you seriously believe that fuel efficiency is an issue in this scenario? Good grief.
With only 2 screens available, it is going to add complexity to the situation. Running a checklist on the R INBD DU, will mean the Engine and Crew Alert Display is not visible, items can be missed.
Both pilots have a QRH right by their side. If necessary, either pilot could run a checklist from the QRH. It's not hard.
A pilot suffering from hypoxia at Penang would make irrational decisions, such as divert to Banda Aceh.
Rubbish. That's pure supposition on your part, with ZERO evidence.