Thanks for the comment, I'll take those into account and try to touch up more on why I choose AP over AD. I'll also try switching clarity out more when I play him, that why I can put better input about it before switching it out in this guide, since so far it's worked out for me. The Sheen and Eve are a little debatable to me, but I'll take those into consideration as well.

hmmm AP Ezreal...Reminds me of back when I couldn't play AD Ezreal. Anyways completely outclassed by AD and has no sustained damage. Might want to state why you choose AP instead of AD. Way I see it, only 2 points being Essence Flux for teamfights and last hitting champs with Arcane Shift.
Points I want to raise:
-get Sheen early. play him like AD Ez early game. All his spells have pretty high cost aside from Mystic Shot.
-get rid of Clarity switch with some of your other choices. Get a tear of goddess late-early game and spam Q to fix mana problem so you don't need clarity. see the synergy? ^___^
-survivability. you get hit by an Evelynn out of nowhere you can't even live through the stun for a double flash. You also don't provide any CC solutions. Fix these I'm sure you'll be doing better! ^___^