UNIQUE passive: Immolate rework idea

So, we all love those gorgeous tank items. Of course, I'm talking about , , and . It's a lovely and jolly experience to massacre people by existing (Sounds like when I was a baby), but it really gets you when there is an invisible having a picnic at an enemy turret. You walk over there to get some hits while your minions are doing very little damage to it, but WHOOPS. Your immolate simmers the enemy, and the turret doesn't like that, so you get blown to the ground. I'm basically thinking of a rework for the Immolate Unique Passive and I want it to be an active: Toggles on or off Immolate with maybe a 1.5 second cooldown. I feel like this takes off a bit of stress when doing a tanky jungler who needs to recall in the jungle or people who are afraid of going near a turret who is babysitting a coward. I want to what everybody thinks about my idea :3