Given that scenario it would be sensible turn to what I think is north away from concentration towns and, hopefully, away from hills and to the flat lands. Pending a semblance of stability and control, definately mayday to get DF position. Vectors would probably be useless as the DI would have started to loose any accuracy almost immediately.
Mustn't forget to turn all superfluous electrics off to get as much battery time as possible...esp if electric flaps.
Q for GtE: Why landing flaps? My thought would want to reduce the possibility of sink, even if I am 5-10kts faster. Maybe one stage of flap?