Best fluxes for each character?

[EverChosen97]

So I've just gotten the airship and the key so I'm starting to backtrack and grab the chests, but these spritnite-eaten monsters still kick my ass at lvl 30+. I'm thinking i should start getting fluxes to buff myself up a bit since haven't gotten into them yet, I have NO IDEA how to farm them or which ones to farm for what character. Any got recommendations for the best fluxes for each character? I cant seem to find a guide detailing this for all characters so thanks in advance

[Atsuga]

There are some very good builds on youtube by the user sin tee - depending on your character of choice you can decide on which of his builds you prefere. Beware tho that farming these fluxes as shown in his videos can take up to 6 hours (but will be very rewarding). I also recommend upgrading your weapons with the tools from the smith's shop.
Here is one link to his video: https://www.youtube.com/watch?v=DsVRX4Tu_jY&t=78s (Endir )