If you see Evie uses Ice Block and stays in it to heal, Charge your shot and aim for the head. there is a small window where Evie can't take action after Ice Block and you can one shot her as she comes out.

Since people like to run Enforcer and spam Juggernaut, try and save your Setback for when he winds up his dash.

Grover can do a lot of damage to your teammates trying to get on point. Consider flanking to Grover's Spawn's side and shooting him. This will make him have to focus on you and not killing your team. May throw off flankers for a bit. STILL DANGEROUS!

Cassie's Roll'n'Shoot combo givers her shot 195 bonus damage a shot if she can consistently hit you. and it reduces her roll's cooldown to 1s. If she rolls, try using a movement ability to make her miss out on the extra damage have to wait full time.