I had a strange idea to rework sightstone for supports so they aren't behind so far in levels.

My thought was that Sightstone would have a passive if you did not take a minion kill(outside relic shield) in the past 60 seconds. you will passively gain some bonus exp until you reach the average level of your team. The bonus exp increases depending on how far you are from the average level of your team.

Say you are level 5 and the rest of your team is level 7, 8, 10, and 8. By adding all 5 of them together and dividing by 5, the avrage level would be 7.6, if we round up it is 8. You are 3 levels away from the average level on your team meaning if you would gain 5% max exp every 10 seconds to level up at 1 level below the average(say at level 1 you need 200 exp to level up, 5% would be 10 exp) but you are 3 levels below the requirement, you would instead gain 12.5% max exp of your current level per 10 seconds and it will go back down to 5% once you're 1 level away.

The passive is deactivated when you are the average level or are level 18.

Thoughts?