There are two good choices:
Fighter, Red Mage, White Mage, Black Mage
Or
Fighter, Thief, White Mage, Black Mage
The first party is very strong in the early game, but the Red Mage is very much a jack of all trades and master of none. The second party starts out weaker, but gets much better after the class change. Having a Ninja in the party is much better than having a Red Wizard.
Four Monks.
In my experience with sisters, the flatter of the two fucks harder.
I guess that's one way to graduate.
I hope Hexa can retrieve everything without too much bother. To anyone reading this, please get yourself an external hard drive and make it a habit to regularly back up everything that you might need again. Preferably make an additional copy on another system too just in case of a freak accident. It's good practice that will save you huge headaches later.
I have an entire PC dedicated to essentially being a fileserver for backups for precisely this kind of reason, and for some things I keep thumb drive archives so I can move them quickly to other PCs. Even have some stuff stored online in places like google drive.
tl;dr Keep backups ffs. Human error happens to everyone and tech isn't as reliable as you think it might be.