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.
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!
If the enemy Ash doesn't pick up Resilience or the "Battering Ram" Legendary, then you can punish her for it by saving your hyper beam to knock as out of her ult's safety circle. This will often waste her ult or her movement ability.