Question: LeiFei followup afer MC/TR back facing

Whats the best followup(s) when you MC opponent in the back from a TR.

When the opponent TR rolls from face down and head towards you, opon hitting them in TR they will stumble with back towards you...

Whats are good followup at close range? I'm not sure which connect but I was thinking if the below will work?

What happens when the opponent is hit after the stumble? Do they fall over and stay low or they remain standing? Or are they grounded quickly?

Will these work?

Note: opponent has been in the back while TR and is stumbling with back turned and Lei Fei is at close range.

scorpion+k, b+p, p
scorpion+k, p+k, p, p
scorpion+k, df, df+p, p

uf, k, f, f, p+k, p, p
uf+kg, p, p, p

Can anyone tell me if the above will work? Or offer any other suggestions? I'm need some help as I have limited experience with Lei Fei when combo-ing back turned enemy. They seem to flop down fairly quickly?

Thanks in advance!