I'm running a Starlock who is 16/14 in his casting stats. OTOH, I'm in an 8 man party.
IOW, I think how much it matters depends upon:
1) the particular makeup of your party
2) what that high stat means to your PC relative to his others from a RP standpoint. That is, what is the opportunity cost of that stat vs the others.
IOW, I think how much it matters depends upon:
1) the particular makeup of your party
2) what that high stat means to your PC relative to his others from a RP standpoint. That is, what is the opportunity cost of that stat vs the others.