I vote for Hard Knockdown for the 4K. With hard knockdowns, it would be easy to follow up with a 66KKK or a buffered 2 - K or a dash buffered 236P.
As for the Jubei(9PK) since its -5 and +0, I think a Ushiro Mawashi follow-up is fair. Whenever I did the Jubei I always got punished, even when I...