Fire in the Air drill requires a bit of thought and has horrible consequences if you get it wrong.
Fire on the Ground drill consists in stopping the rotating bits, turning off everything in sight and running away bravely. The exact order is unlikely to affect the outcome!
Thus, the preferred option for fire in the air is to turn it into fire on the ground, then deal with it.
I have, once, in the Sim, had that horrible feeling that goes with shutting down the wrong engine at 200 ft. It lasts just long enough to reach the thought "we're gonna die" before it all goes quiet. I really wouldn't recommend fiddling with fire handles, ECLs or the fuel panel in preference to landing.
Sven