Edge of night is really not that big of a deal

I would agree with you if it had a noticeable cooldown and wouldn't make assassins unpeelable (especially Kha'Zix)

You can move while channelling, and it's only a 30 second cooldown. Rather little incentive not to use ti whenever things look frisky.

What i think is silly is the fact that if you mess it up, its only a 5 sec cooldown, and the 30 sec cooldown starts when its finished channeling. So its basically a 20 second cooldown. How much leeway does that item need?

Meanwhile banshee's veil goes on 45 second cooldown because you got to close to someone who got hit by 's ball and tickled ur shield.

I agree for normal Assassins.

For ranged characters, the shield should have a reduced duration.