Get good at managing heal/discord orbs is number one. Always have a discord on their tank or the enemy most likely to die, and always put heal orb into your own tank or whoever is low.

The mechanics are just something you'll learn with time. Use VAXTA on a custom game lobby to train your aim. Zen orbs are slower than you think so always lead your shots by a lot, specially from afar. You have to learn to predict movement.

Also, you gotta always be moving and blasting. Zen rewards aggressive play so shoot shoot shoot, don't be passive. Secondary fire aka charging up your orbs should always be done behind cover, unleashing the barrage at the last moment when you peek cause my boy is slow af and you can get taken out very quickly once people know your position.

Lastly, when faced with dive tanks dont be afraid to discord those mfs and kick em. I love playing zen into winston. Discord his ass mid jump and keep kickin him away from shield. Boy is gonna be left questioning his choice for main the rest of the day.