Do not rush the objective when there is a deadzone placed. This means playing passively and prioritising targets on the enemy team while waiting for the deadzone to disappear. Once it's gone, the team can group up and start to slowly cap the point.
Viktor is not CC immune during Barrage! If you so happen to be close to an enemy Viktor using his ultimate, Runic Blast will prevent him from attacking for a few seconds, allowing you and your teammates to save themselves and/or kill the Viktor.
Pressuring a Viktor at the backline can be successfully done in open maps like Frog Isle. Build cauterise and haven to survive the 1v1 encounter and use heroic leap to close down distances covered by Hustle or to save yourself.
Don't feed a Zhin's counter when he has the counter legendary! Treat it like Androxus' reversal, but one that can be done twice in a row. When you see a Zhin in counter stance go for one of his other teammates instead.