There is no real reason to give mages a kneecap like naztherak have. Breaking someone else's kneecap because you broke your own intentionally doesn't make it better, and proposing a point-exhaustion system for mundanes would likely require admin approval and never pass moderation/LT because it would introduce a solidified meta to CRP and further the HEMAmaxxing of CRP
"Long Rests" do not exist in LoTC - the standard is 12 OOC hours or 1 OOC day and you should specify which.
we'll suffer with all 5 pixels of this image but in general, casting doesn't need a hard X theoretical spells per day. All a mage can do is cast, and they're the template for all other half-casters to use a mana-point or X uses per day thing because they opt out of most of the detriments of being a caster mage like voidal mages. Likewise, no matter what passes, a vast majority of spells and feats (and other lore like tears and focuses) will need revising to adjust for a more concrete system. Expulsion is a T2 spell with mana cost effectively surpassing 2 T5 spells, meanwhile a T2 water projectile is quite literally an annoyance more than it is effective.