Talk:Speed Drift/@comment-91.206.63.67-20151217081249

with Natural Talent you will spend 1/1,5 = 0,6666... of usual time on each cast.

with Natural Talent and Speed Drift you will spend 1/1,65 = 0,606060... of usual time on each cast.

0,606060... / 0,6666... = 0,9090... <- roughtly 0,91.

So, adding Speed Drift gives you about 9% casting time profit. I can hardly imagine any situation where I`ll need this buff in exchange for a mod slot.