Be Wise About Your Bans
If League were truly balanced, then we could use bans to focus on champions that counter our intended team comp. That said, if anyone actually planned on doing that you'd be pretty fucked in SoloQ anyway.
Unfortunately for us, there has never once been a state of balance where that was possible. There have always been a few champions that make or break a team if the person playing them isn't blind with broken fingers.
Those champions are banned because, while they still fit into a particular subset of champions who do their job particularly well, the next runner-up stands next to no chance at beating them at the same job.
Point being: don't waste your bans on champions with a job that can be easily replicated at the same level of efficiency.
One example would be the group of junglers with easily-used AOE CC:
. Chances are if you ban Malphite, the enemy who might've picked him can play Amumu or Sejuani just as well.