Awesome, Matt, congrats
I think you can only hit meditation 40 if you get lucky with the rune/level giveaways. I think there are 3 or 4 combinations, and if you luck out with a good one, you can get twice the max amount of magic runes for the mage, but since the game selects a random line of those 3 or 4 combos, there is no way to be certain.