You can cancel throw into zettou C-6C-2C-zettou-B-Divekick which is your go to, otherwise if you want drill you can do throw 236D~C > Dash > 6D
The Cancel 5c>6C combos your talking about are slightly more optimal ONLY if you actually do a real combo after them and the difficulty varies to impossible on certain small characters
https://www.youtube.com/user/kamoihito/videos months ago he made combo videos for just about every situation with Amane, I recommend you watch them