BTW, I've finally decided on the Ability I want for Jake (admittedly inspired by Thunder God Cid):

[b][u]Hellcry Punch:[/u][/b] An attack that smashes through a target's defenses, and has a good chance of inflicting [i][b]Power Down[/b][/i] (reduces the target's physical attack power) or [i][b]Silence[/b][/i] (temporarily disrupts/disables magic).

The description was taken from the [url=http://ffrpg.net/ffrpg/adepts.html]Adept jobs list[/url] on the FFRPG wiki, so I might just settle for a chance of strongly weakening physical attack power with a hit. The Final Fantasy Wiki page for Sword Saints [url=http://finalfantasy.wikia.com/wiki/Sword_Saint_%28Tactics%29#All_Swordskill.2FSwordplay]only mentions destroying the enemy's equipped weapon[/url], so that might be a bit overpowered for a setting where people depend on keyblades.