Would have thought the VFE full flap dive would be to get it on the ground quick - that config would give you pretty much max ROD on a light aircraft.
Then again, a VNE dive would also get you on the ground quick - potentially into a nice self-dug little hole. I personally would leave that option til last (not sure in the stress of the situation whether I would pull gently out of the dive etc), going for the all off/ sideslip method. Other reason is that most GA cruises at levels where they would be v v low by the time they reached VNE, so better IMO to be getting down fast, looking for a spot to land and turning all off to stop the burning.