Since Hayate's moves are so easy to read, it's not wise to do too many mix-ups after the first stun,especially against those hold-advanced characters like Bayman,Leifang,Rachel,Ein,Leon,Bass,etc.
These are what I use,
After 66P/CH 6P/CH 3K/CH 1K/3HK to get the first stun,do
1. HK
or
2. 3PP
or
3...