Thanee - Let's just run with the base here.
At 343 PP, with augmentation maxxed for max damage that is about 343d6 damage.
At level 20, you can get 343d6 in 24 spell slots or the equivalent of (17x6+5x6+9x6+7x6) 228 PP. You have not yet touched 6th, 7th 8th, 2nd, 1st and 0 level spell slots...