Endgame builds/levels?

Hi- I've completed 5 of the main stories. I chose Throné as my main. She's at level 67, and I took her out of my party as soon as I could. All of my other characters are 59-60, and I'm currently at the point where I can beat regular enemies before they have a chance to attack.

I recognize this point from OT1. This is where I was before I got completely slaughtered by the final-final boss, granted my my team was very lopsided, level-wise. I'm trying to be smarter with OT2.

Am I on track to 100% the game? I've cleared about 1/2 of the side quests and plan to finish all of them before trying the secret final boss. My strategy has been to put Boost-Start, Full Power and A Step Ahead on Castti/Agnea. I always have someone with Extra Experience and don't do Evasive Maneuvers unless I'm running through a low-level area. Like I said, that's usually good enough to finish the battle before the enemy gets any attacks in.