[Lolzytripd]

If the issue isn't how much damage EI can do, but that tanks use it best due to being able to do roughly max damage at half health, change it to percentage based.

100% damage = 500 damage before modifiers.
1% missing health = 5 damage.
rank 1 4m 2+% missing damage
rank 2 4+% missing damage
rank 3 6+% missing damage
rank 4 3m 8+% missing damage
rank 5 10+% missing damage
rank 6 12+% missing damage.

At best you would need to be at 12% health remaining to do the full 500 damage before modifiers.

This is still my preferable "nerf" to EI

EI's damage stays the same, it becomes completely tied to % of health remaining however.

A low base hp ghost will have an easier time using EI than a tank.