Ok so we know there are only 4 classes but what if
there are Alternate weapons for the same class that changes its roll a bit.
an example: the Rune mage could have a staff as an alternate weapon changing
the Type of spells they use Going from Ranged DPS to Support/healing type
or a warrior could change from sword a shield to a katana Going from Tank to mele assassin
though I don’t know how it would work but its just an idea
the point is that the players retain the same class but can have different builds and rolls
this way the class system does not need to change and there is Variety to go around