Can Nasus's E be changed to be DoT rather than up front burst?

Right now his E does a fairly massive amount of burst damage upon the initial cast with some extra damage and armor shred coming later. Would it be possible to make the spell tick faster or more often, but get rid of the massive burst upon cast? I don't think AP Nasus is a bad thing, but so much damage shouldn't be immediate on a juggernaut. None of them (Other than Morde's third Q, but that is also delayed) have such fast burst damage on such a low cooldown. He has one of the strongest slows in the game, so it wouldn't be that hard to keep them in the AoE for a large amount of damage from it.