Feel free to pick off Symmetra at a distance, but you should only advance on her if you're with your team.
He told her that it was best to put the bike to burial, but Ashe refused to give up.
Use the secondary fire when close to an opponent to quickly deal massive damage to them before they can respond.
Pharah can be shot down mid-air with only 3 shots, but you'll need to be in your effective range, which isn't infinite.
At longer range, both of you have the same damage falloff, but Mei's Icicle is a projectile while your Peacekeeper fires a hitscan bullet, meaning you'll have an easier time landing your shots.
He was even refused his week's wages.