Mage feedback on nearly perfect casts


I tested the highest and lowest number of a mage spell and found out that you see the “nearly perfect” sparkle on about 50% dps accuracy. So I was thinking could we get another visual/audio notification on 75% accuracy to further motivate mages into casting more accurate?

(Just to be clear the difference between the worse cast and best cast what I could measure is about 20% damage. So lets say you make the worse fireball ever that still works. You get 10000 damage. And then when you cast perfect you get 12000 damage. And when you get the perfect notification ATM you get a minimum of 11000 damage.)