Sorcerer CHA based casting table

I'd love for sorcerers to work properly on a system similar to Clerics. As CHA is essentially Force of Will which sorcerers cast with raw energies and 'brute force' i figured using a table as following would be fair and add some flavour to playing whats considered hands down the single best class in the game and give some love to the least loved ability score in a single blow

	Ability 		Bonus 			% Spell 		Max Spells 
	Score			Spells			Failure			Known/level
	3			-			80				-5
	4			-			75				-5
	5			-			70				-4
	6			-			65				-3
	7			-			60				-2
	8			-			55				-1
	9			-			50				0
	10			-			45				0
	11			-			40				0
	12			-			35				0
	13			1st			30				0
	14			1st			25				+1
	15			2nd			20				+1
	16			2nd			15				+1
	17			3rd			10				+1
	18			4th			5				+1
	19			1st,4th			0				+2
	20			2nd,4th			0				+2
	21			3rd,5th			0				+2
	22			4th,5th			0				+2
	23			5th,5th			0				+2
	24			6th,6th			0				+3
	25			6th,7th			0				+3

This could allow for ability drain to be altered in a way that could affect all stats aside from str drain.
to prevent being stymied by the problems ability drain could have, if its coded similarly to Midflayer Int drain, it wouldnt have any different side effects aside from lossing the ability to cast those spells that day etc.

Table formatting. -Jalily