I think you really only need 30+ Marriage Points by saying the correct thing 6 times and you already get the best reward. Though I believe 130 is the threshold for getting the best result. Not that it matters because the reward is still the same and I don't think the quest gives any % points at all.

Hooray for Trainer, the best dressphere in the game.

The Berserker has a neat ability, Unhinge, that reduces the enemy's accuracy and evasion. That might've been helpful.

Gotta give credit to the voice acting performance on Shuyin. The contrast to Tidus is great. I definitely wish the connection between the two were more defined though. Any theory I've heard so far has either holes or far-fetched assumptions, or is just unsatisfying.

I still don't get how the hell Yuna got out of there.

Oh god Chapter 4. The part where getting 100% is the most insanely boring and tedious thing in the world. Probably the primary reason I've decided not to bother with 100% in one run anymore. Good luck with that!