Magic users will end up OP compared to physical users.
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If DEX and PER add nothing significant to magic users (and they do not), then magic users will be OP compared to physical users. "Why", you ask?
Because everyone uses INT to learn and progress, and everyone uses mana to fuel skills.
Now if you have an archer with 20 PER and DEX, and 10 INT, and you have a magic user in lets say 20 INT and CHA (or something), and 10 DEX, they will both be EQUALLY effective in combat, cus they both have their main attributes maxed to 20 BUT magic users will learn faster (due to their main skill also being used for skill progression) and thus progress faster (and progression will take long time), and they will also never lack mana to fuel their skills (INT=mana fueling all theirs skills, while archers for example also needing mana for part of skills, while having INT on only 10 if they wish to max their primary attributes).
This ends up in magic users being OP compared to non magic users that can't boost their INT due to needing to max their other attributes, to be equally effective as mages that boost their INT as their main attribute.
Main problem here is that INT is used for learning (and fueling skills) for EVERY class, while it also being PRIMARY attribute for magic classes.
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SOLUTION 1: make DEX an attribute that's used to learn (and fuel ALL skills) for archers, and make STR do the same for warriors. (This solution is harder to implement, that's why I would suggest solution 2 below.)
SOLUTION 2 (recommended): make a brand new attribute (lets call it WISDOM) that is used for fueling ALL skills for everyone, and used to progress knowledge for everyone, and adds absolutely nothing else for any class.
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INT fueling skills for everyone and affecting learning for everyone (while also being a primary skill for magic users) makes magic users being OP in Fractured.
(Just a thought, but a likely outcome with what we know so far.)