Tower of zot

I have played this game many times, and I always have trouble in the tower of zots. Im at the point where I am about to go there but before I do I wanted to know whats the best level to be on. Right now my levels are...

Cid ~ 21
Tellah ~ 24
Cecil ~ 19
Yang ~ 22



Never mind, now im about to go to the moon, but I wan't to build up Rydia levels before I go and Lisa's. Where is a good place to do this?

Current Level:

Rydia: 34
Rosa: 36
Cecil: 35
Edge: 34

Edit by Kishi: Hello, allow me to introduce to you the civilized concept that double-posting is not allowed.

I'd recommend your party's levels be about 40 before heading to the Giant of Babel. Go to the moon, and train on the first floor of the Cave of Bahamut.