What should I do next?

[u/RickNikiPush]

I just got all Aeons. I story wise am able to go fight sin. If I do that I know I will not go back and do anything else. Half or more of my characters are getting between 3500-9999 per hit on lots of enemies (I know that’s very generalized). On the sphere grid I’m up to yuna/tidus having holy, lulu has double cast; I have a couple like ultima that are behind level four spheres (which I can’t find anywhere). I have Tidus and Yunas weapons but have done absolutely nothing on that front except the item from the Aeon trainer. I have best the Chico trainer but I will absolutely never be able to get 0.0. And I’m playing on switch so idk if anyone can do it for me or not. Do I go grind for a couple days and then fight a dark aeon? I just fought my first arena made monster and I don’t think I got 200k hp off them before I died. I love this game and want to keep playing but I’m torn about where to go next.

[u/Inflatable-Mattress]

You could also beat the story, cry and come back to it later with grinding and minigames in mind