Enemies are considered isolated if they have no allies within a short distance. The damage of Taste Their Fear is massively increased against these targets.
Unseen Threat activates when Kha'Zix cannot be seen by the enemy team. Reactivate by using brush or Void Assault. Don't forget to apply Unseen Threat by autoattacking enemy champions.
Kha'Zix has a great deal of freedom to choose where and when to fight. Pick your battles carefully to succeed.
Taste Their Fear deals bonus damage to targets that are isolated. Gain an advantage by fighting near allied minions, champions, or turrets.
Leap and Void Assault have long cooldowns. Kha'Zix is very vulnerable when these are not available.