New Duskbalde on Kha'Zix

The new Duskblade has this effect, when unseen by the enemy for 1 second, to deal 105 - 360 damage and slow for 99% for 0.25 seconds on your next basic attack. Kha'Zix becomes stealthed for 1.5 seconds on his ult, twice. So in a very short timespan he can proc Nightstalker trice Honestly I think this synergy is a bit too strong and can cause problems if the damage is tweaked around him. I propose the following nerf to nightstalker: 1 second -> 1.5 seconds of being unseen. This might still be too strong, but at least forces Kha'Zix and other champions with invisibility to remain invisible for the maximum duration.