EQUIP a chemical launcher. FIRE to launch a canister that shatters upon hitting the floor, creating a lingering chemical zone that damages and slows enemies.
Don't be afraid to use [Q] Poison Cloud early in the round to secure ult charge orbs. You can pick it back up afterward.
Viper's Ultimate [X] Viper’s Pit shines at both attacking and defending plant sites, especially when equipped with a shotgun.
Viper's core strength is her ability to freely activate/deactivate her [Q] Poison Cloud and [E] Toxic Screen for calculated zone control.
Using [E] Toxic Screen to split a site in half when looking to plant/disarm is a solid option to contain sight lines and keep combat close quarters.