RangerWickett
Legend
What I've advocated is tiers:
From level 1 to 5, you're an Adventurer. An adventurer wizard can cast one or two cantrips but then have to spend a few minutes gathering back their mana to do it again. They can cast maybe one or two low-level spells per day.
From level 6 to 10, you're a Hero. The wizard casts cantrips at-will. Low-level spells you can cast over and over, but you have to spend a few minutes recharging your batteries. And you can only get one or two mid-level spells per day.
From level 11 to 15, you're a Paragon. The wizard casts cantrips and low-level spells at-will. Mid-level spells must be recharged for a few minutes before you can recast, and you can get a couple high-level spells per day.
And then from 16 to 20, you're a Legend. Everything from, like, teleport on down is at-will, and even the really crazy stuff like meteor swarms and gates you can cast every few minutes.
From level 1 to 5, you're an Adventurer. An adventurer wizard can cast one or two cantrips but then have to spend a few minutes gathering back their mana to do it again. They can cast maybe one or two low-level spells per day.
From level 6 to 10, you're a Hero. The wizard casts cantrips at-will. Low-level spells you can cast over and over, but you have to spend a few minutes recharging your batteries. And you can only get one or two mid-level spells per day.
From level 11 to 15, you're a Paragon. The wizard casts cantrips and low-level spells at-will. Mid-level spells must be recharged for a few minutes before you can recast, and you can get a couple high-level spells per day.
And then from 16 to 20, you're a Legend. Everything from, like, teleport on down is at-will, and even the really crazy stuff like meteor swarms and gates you can cast every few minutes.