Nautilus Update.

Okay guys, I like Nautilus, I will admit that bias from the beginning. I also admit his is not an amazing champion as of now. I know his shield was upgraded, which is awesome, but I would like to suggest another addition. This is update would again be for Titan's Wrath.
This ability does AP damage over time (specifically two seconds) after every hit, but I would like to suggest that this AP damage over time would stack. Similar to twitch's stacks of poison, and theoretically the mechanic of health and manna potions, allowing the over time damage to overlap. Of course there should be a cap to these stacks, I don't want him overpowered, just given a chance to be a little stronger. This would also allow Nautilus to go AP without the Deathfire Grasp and still have it be effective. Thank-you for your time, have a nice day/night. If you have any thoughts, questions, or want me to clarify my meaning, of course comment.