Deathmatch: Minions vs Champions
Objective: To be able to show the winion power and how much they actually help champions during games.
So basically, there's a champion team and a minions team. No minions spawn on the champion's team.
There can be 3 strong (than the average) minions per wave, or maybe there just can be like 15 minions coming at a time. The objective is the same as a normal game; the goal is to destroy the nexus and destroy the connection between the to-be summoners and the minions themselves. The turrets on the minion side can be powered a little down, since the champions will have to tank them. Since just clearing minions can be a thing, champions get a little less exp when killing a minion.
There can be much more ideas that could be implemented to this mode as well.