DoT mages too strong with DFT? Why not change DFT?
If damage-over-time mages are too strong with Deathfire Touch, why not change how the mastery works rather than nerfing the champions that use it?
Nerfing the champions who use Deathfire Touch because they use Deathfire Touch, will nerf their power without DFT and force them to take DFT to remain power neutral.
So rather than nerfing Brand, Malzahar, and Swain because of their synergy with Deathfire Touch, why not change Deathfire to proc it's damage-over-time effect only once per spell cast or other source of damage-over-time spell damage?