Str, Fin, Int - Personally i think these should perhaps have additional offensive benefit that applies to anything (not just aligned scaling spells/weapons) - example would be Fin providing pierce damage or something.
Thank you for raising the question.
In DOS1 masteries'dependance on a specific stat was the worst mechanic which blocked multi-classing. In DOS2 the situation is not so bad due to non-damaging skills, but far from perfect.
I believe stats should not boost exclusively specific masteries and weapons, but have only general effects.
