I always thought the priority was to get onto the ground before you got possible structural failure in a twin.......
If you get to 50ft above the ground with the fire still blazing, are you going to priortise landing or getting the fire out?
If the fire has already knocked out the gear before you could lower it, are you going to try to manually put the gear down - for example let's say the fire was in the LH engine on an Aztec which houses all the hydraulics.....or are you going to put the aircaft onto her belly. Is obvious answer, eh peeps?
So configuration for fastest loss of height is full flap, gear down.i.e. max drag to offset the steep angle of descent.
If you had airbrakes, then these should also be deployed.