Protips:

Use aggressive behavior only. Ranged behavior will drive you insane.

Only allow your tank to drink potions automatically. Manually drink for the rest of your group or you won't have any potions very quickly. the game will auto drop potions if you have less than 2 in your inventory.

Not sure if they fixed it, but in the tactics, skip to line # is bugged and will be -1 of the set number.

With NM and FF, it helps to have a tactics set for resetting the group, like dropping all reserved abilities. Along this line, if you set your group to use the heavy spells first, then use abilities that reserve mana or health after they reach the reservation level, you literally gain all that mana you spent before activation, essentially doubling your mana pool. Also think about dropping reservations before they drink potions, that % recovered is based on unreserved values.

Think about the cross class setups and having this work throughout your group. Having one status applied by one character for others to then trigger off of. You can use skip to line #, to ensure these status are not interfered with by the rest of the group so they are not wasted.

There's more of course, but those are some good guidelines.