quick fix mage t3 dps clunkyness. It is not a fluid mechanic. Please simplify the interaction. channeling for 8 seconds 
To me simply not needing to implement anything, just change numbers:
- give a longer buff time (like 1m) then nerf % dmg OR limit amount of ticks per evo, and make the cd of evo 30/45. Evo buff uptime minigame for 1-2 stacks that is easy to tweak.
alternative fix that requires work:
- implement it as casted evo as a self buff.
- implement any interaction with arcane surge ?