If Meave isn't using Artful Dodger, and you have Surprise Attack, break hidden with Poison Bolts and do your hit her once from behind. Follow that up by using smoke screen to hide yourself and let the damage encourage Maeve to retreat.
Careful near edges as cassie can one shot you if she sends you out of the map. knowing this she may chase you there in order to get an easy kill. Try knocking her off instead or leading her to a team member who can if you need to retreat.
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.
Avoid relying on your turrets as a "Retaliation" Zhin has the ability to use your Turrets to get free Health from his "Perfect Block" card and can use Counter's Damage to kill you quickly. Consider picking up "Tinkerin" so you can fight, not feed.
When you see Zhin is an Opponent, Look at his Legendary. If he isn't using Retaliation, Feel free to shoot his counter from a distance as he will only have one block. Never Shoot a Retaliation Zhin though as most Heal from it... A LOT!