By ability score I mean intelligence, strength, etc..
Your base seems to cap out at 15. So while you can improve it via items and the know-it-all feat... bigger and better doesn't help you, nor can you add anything above it past a certain point.
15 appears to be the highest you can naturally go.
I currently have int 21 (1 from KiA, and 5 from items +15)
By that point teleport cools down every other turn and virtually all spells are available every turn.
