When Sha Lin plants down, reflecting becomes very easy so sha lins will have to take you out with their primary fire. Stay in the air against sha lin as he is a projectile hero also because he can stun you if you're on the ground.
Tyra is very strong against you, in order to win this fight you'd either have to hit a head shot, hope that her aim is off or flank her with the best option being to flank her.
When Willo Ults, fly into the air as well to take her down. This makes it a lot harder for her to hit you, especially if you have good aerial movement.
In a 1v1 situation, silence him with running blast and deal damage until he uses emitter, then channel recharge towards him until he runs out of shields then finish him. Nimble would be perfect to keep pressure on him if he tries to run away.
If you pressure Seris into using her escape, turn around and listen for Seris uncloaking. Try getting someone low in the mean time, this will often cause Seris to believe she is safe since you aren't looking at her and will uncloak to heal her team.