No reason to use any.
4 frames cooldown time for power bombs
14 frames for ice missiles
1 Power Bomb = 1 Ice Missile
So it would be:
Missile + Jump x 11
Down
Nothing
Down
Up + Power Bomb
Right
Nothing x 3
Missile ( + Jump)
Compared to:
Missile
Nothing x 14
Missile
thus saving 10 frames per power bomb
unless he defeats it before the power bomb goes off
14 frames for ice missiles
1 Power Bomb = 1 Ice Missile
So it would be:
Missile + Jump x 11
Down
Nothing
Down
Up + Power Bomb
Right
Nothing x 3
Missile ( + Jump)
Compared to:
Missile
Nothing x 14
Missile
thus saving 10 frames per power bomb
unless he defeats it before the power bomb goes off