It will become too bursty equart.. If you wear knight helm and graveguard boots no one can stop you (if he doesn't have purge).
That´s very situational and then you are a sitting duck, not to mention you can still be silenced, interrupted and such.
If you pop knight helmet and gg boots you cannot be silenced/stunned or interrupted by any knock back. I don't know if claw Ecan do something but I'm quite confident you are safe also from this.
You can deal twice the amount of max damage of a bl E and aoe.