I teach it in a Seneca & a Courger, I get them to come in with only 10 degrees till the decision height which we use 300 feet, if you aren't happy then go around, then if happy put in the seneca put the 2nd notch down ( 25 degrees). Once that 25 degrees is down & with the gear out even if you went to full power you would still have to lose height simply because the hourse power required curve is above the hourse power available curve till you get rid of the flap.
I wouldnt call myself a flying school mushroom
at all , if theres two ways to skin the cat, I'll look for a third.
But if I was in the real deal one engine feathered, in the planes I fly if you are much below 300 ft you are committed to landing no matter what, not sure bout the bigger boys
But also remember, better to go thru the end fence slowly & live rather than try to do a go-around from 100 ft, ****** it up, smash it in & kill your self, just a thought.