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.

Try to predict Lex's auto aim ability and deflect it! This should be able to take Lex down to a low amount of health. If you aren't able to counter ti it will all come down to who has better aim.

Save your Nether step reload for when you run out of ammo, this will ensure you can kill the seris before she can get away with her invulnerability.

Good aim will take you a long way on this champion. Learn his range. Always have an escape plan. Understand how to win every matchup (will come with time). Use your mobility!