The way you'll want to use Momiji's 214P/214PP+K is basically just in critical stun threshold.
CH 3P > 214PP+K for example, will allow for a BT4P ground bounce crumple and follow up for guaranteed damage. Another way to do it using 214PP+K as your next and last hits in critical stun threshold, so that the string will ground bounce crumple the opponent for guaranteed damage.
When I say guarantee damage, I mean following up with 6PKKP or 6PKKK. Or 3P4PP on super heavy weight.
214PP also allows for a guaranteed wall slam by the wall.
You're never going to get a realistic critical burst on anyone with 214P.
CH 3P > 214PP+K for example, will allow for a BT4P ground bounce crumple and follow up for guaranteed damage. Another way to do it using 214PP+K as your next and last hits in critical stun threshold, so that the string will ground bounce crumple the opponent for guaranteed damage.
When I say guarantee damage, I mean following up with 6PKKP or 6PKKK. Or 3P4PP on super heavy weight.
214PP also allows for a guaranteed wall slam by the wall.
You're never going to get a realistic critical burst on anyone with 214P.