This is possibly the most ridiculous thread that I have ever read on pprune. The very idea of getting a crew together to attempt to fly a 1-engine ferry flight in a B777 is just so beyond the bounds of utter bol*lox that I cannot believe what I am reading.
I have carried out several 3-engine ferry take-offs on 4-engine aircraft and one 2-engine ferry take-off on a 3-engine aircraft.
No pilot on this planet would ever consider a 1-engine take-off on a 2-engine aircraft.