All of there classes do pretty good damage over all in the game
Cora focuses more on the offensive with their WOW PowerLeveling Dark Magic line's buffs. All of there classes do pretty good damage over all.
Cora Warriors are especially good with a defensive skill that doesn’t relief on having a shield, meaning you can use a two handed weapon more safely.
If you want to use a two handed weapon then Cora is an obvious choice over Bellato unless you just want to be Bellato, and Accretia is close behind. Cora Casters greatly out damage Bellatos. Their rangers, however, don't match up to Bellatos.
But remember, a big part of the Spiritualists in RFo are their buffs/debuff. RFo spiritualists are not your typical fragile as glass, powerful as nukes, mages! (But they are very strong; they are balanced with the other classes) Only Cora can use Dark Force.
Accretia's armor has a bonus defense over Cora and Bellatos'. They have a special potion to handle removing magic debuffs, since they have no spiritualists magic to remove them.
To put debuffs on the enemy they use a special status launcher and ammo that have different debuff effects. They have a special launcher weapon that basically makes up for their lack of staves.
