Riot/@meddler, would you please consider supporting Lichbane for bot lane mages?
Lichbane has always been one of my favorite items because of how it can provide both sustain and burst damage. Most mages use it for burst, but you can use it for sustain if you have low cooldowns or try to cast atleast 1 spell on a 1.5 second interval.
Hence, would adding Lichbane to the new 20%/500 mana AP item set be op?
Compared to 
20% cdr should be fine if you raise the cost of lichbane as well.
In any case, I think lichbane would be a great addition to sustain damage mages bot.
