I finished the story but I still have quite a few missions to go. I'm doing one now where I have to kill ten mimics, but only four have actually appeared (from treasure chests) and no more have shown up. >_>

It might be worth your while to make a Hume mage so he can eventually become a Seer. They can get pretty broken. They're basically like Hume Red Mages, only with lots of potential for cheapness. :P

I've never really liked any of the Bangaa White Monk jobs, but it might be worth making one just because they can eventually become Master Monks and Tricksters, which are two new Bangaa jobs. :P

When you get the correct sword, it'll be worth your time to change Lusso into a Ninja long enough to learn Dual Wield. I had him as a Parivir for a while, too. The stat growth is nice, but I almost never used his techniques. Fighter definitely has better A Abilities.

I want 4 Humes, 4 Bangaa, 3 Moogles, 3 Nu Mou's, 3 Viera, 2 Gria, and 2 Seeq. This is probably good? Also, when I unlock all the jobs for the race, how many jobs do I actually want to use, probably 3 of them?
You only technically need one of each race (besides special characters) to complete all of the missions. :P It's good to diversify, though. If you have at least one reserve character for every job, there won't be a single dispatch quest you can't handle. :P

I keep focusing on dispatch quests because I don't think it's a good idea to raise that many characters for battle. You'll never really need them. It's better to pick a party and stick with them.

EDIT: Apparently the description for that mission said one FINGER per serving and not one Mimic per serving so I only had to kill two. ;>_>