Clairvoyance Should Give Assists

Smite, Ignite, Heal, Clarity, and Exhaust currently give you assists.

Why shouldn't Clairvoyance?

"But then the user can get assists from anywhere on the map!"

Okay and they will lose the other benefits of Clairvoyance much like if someone just ignite someone at 5 health which loses them a lot of the damage output of ignite.

The assist should trigger if the enemy was seen by Clairvoyance for X seconds if they die.

That seems more than fair. Damage itself would not offer the assist.