Quote Originally Posted by BG-57 View Post
Delay Buster?
No.

Quote Originally Posted by Firo Volondé View Post
Should "quickest rival" be taken in the literal sense?
Yes.

Quote Originally Posted by Firo Volondé View Post
(as in, enemies with the highest Agility stat). Dark Bahamut, Dark Shiva and Penance are the only enemies with 255 Agility, while Nemesis and Fenrir are the fastest in the non-PAL version, with 200 Agility. The only ability that would fit in is Zanmato, but that's already been said.
You are thinking too complex when the solution is simplistic.