Personally, I have extremely low kneejerk respect for FF5 physical attacks; they face monstrous evasion in-game (Elf Mantles are the best W1-2 accessory, FF5 shields are potent), uber Golem, back row on the lower-durability folks, etc., etc. With all that considered, it doesn't take much base evasion for me to see them whiffing turn 1, so yeah, Tidus qualifies to me.
(You could also let him switch weapons. I don't, but I know some people do.)
That said I always forget that castle Exdeath isn't slow (being a post-Hastega boss in FFX will do that for my kneejerk reaction, at least I can hold Hermes Sandals against the W3 ones...) so I should possibly look at that fight more closely anyway.