Exhaust
With all the crit in the world today. What if exhaust now brought the targets crit chance down to 0 for the duration. How many people on a team would take it?
Would solve a lot of problems with adc (ranged and melee)sustain due to mastery.
With the season 6 changes your carries are often harder to kill them previous seasons so you don't need exhaust to prevent assassins from gimping a fed adc.
With how fast games end ignite seems like a strong choice to snowball lanes.
With objectives on both sides of the map tp also seems important.
Just a thought. And as always a unrelated poll.