Captain 101, would suggest that IMC over hill fogged high ground in a single is not the best of places to be with or without an engine fire.
I subscribe to the Gengis fuel line clearing theory which is all about keeping the combustion brief and on the correct side of the aptly named firewall, thereafter any technique that results in the airframe arriving intact, under control and in the minimum of time over a survivable landing area seems reasonable.
This is very much a survival situation and variables such as weather, terrain, and pilot ability have to come into the equasion.
TR