There should be certain champion combinations that should be disabled.

Okay, so I know it is just a game but I feel that certain champion combinations should not be possible. If somebody selects then nobody else on the same team should be able to select or vice versa. I mean think about it. Picture being and seeing ... What type of discussion would lead to working together instead of a duel to the death?

"So remember that time when you decided to take my wife's soul and torture it forever?"

"Yeah .... so?"

"So do you want to team up and destroy their Nexus while my wife suffers forever by your hand?"

"Sure thing , glad we had this discussion!"