Started Chapter 4 now. I'm jealous of this dude who is playing through the game and is landing like 500damage per hit. Meanwhile, I'm barely breaking 100 and I don't know what I'm doing wrong.
Sure made that second-to-last battle in Chapter 3 real fun.

Had to restart 6 times before I actually beat it.
I do feel awesome about how far I'm getting. Here's my to-do list for Chapter 4;
1) Get all the optional characters.
2) Get Ultima.
3) Get Zodiac.
4) Do all Propositions.
5) Grind my characters up to 99 (the ones I'll use), getting as many helpful skills and jobs along the way as I can.
6) Deep Dungeon.
7) Victory.