In answer to your question, "Would I press TOGA at 50 feet". Yes I would, and yes I have.
That is not what I meant.
Obstacle clearance areas and climb profiles are based on missed approach parameters from the DA, NOT balked landing parameters.
Missed Approach climb is defined as a go-around from at or above DA.
Part 25 assumes required gradient on:
Go-around thrust on engines
Landing gear retracted
Approach flap set
Balked Landing climb is a go-around from below DA, even in flare (all engines are assumed available).
Part 25 assumes required gradient on :
Go-around thrust all engines
Landing gear down
Landing flap set