Nothing guaranteed after 4T
I think the best option after that is something low or mid.. You could try 8k for straight launch...
After low punch hold I just tend to go 9k 2pp pkkjakpp depending on weight of course..
Or 6k and so on..
66k is useful when used not too often. And you have to be really close to the opponent.
Sometimes the jump doesnt work and you land only to receive a wake up kick..
I have asked Team Ninja about the removal of her 7pp.. Strings and the y havent replied...
I think it has something to do with 7p and SSp being the exact same move.....
But anyways, I never use 7P because of this.. Just sad in my opinion