bronze league = level 2 summoners
silver league = level 4 summoners
gold league = level 6 summoners
diamond league = level 8 / max level summoners
champion league = top players in the game with way too many max level cards.

Please adjust how much rating is gained from battles in modern league.

I should not have to own/rent 2-3 max level summoners and teams just to compete for silver league rewards.

Take a random sample of like 10,000 battles in each league and adjust the gain in rating accordingly so that the average silver league player uses a level 4 summoner. and so on.

Do this on a daily/weekly/or per season basis.

Or do something as follows.
silver 3 = average level of summoner played = 2.5
silver 2 = average level of summoner played = 3
silver 1 = average level of summoner played = 4
gold 3 = average 4.5
gold 2 = average 5
gold 1 = average 6
diamond 3 = 6.5
diamond 2 = 7
diamond 1 = 8

If you are going to increase the cost of renting cards, then increase what we earn by playing them.

SPS rewards would probably have to be adjusted due to the fact that everyone would have much higher ratings.