@Everrlong
It's is a valid tactic...
I'm not saying just damage that one guy.
Luc and Ezreal, my two mains, have ultimates that go through all the targets ya know?!
And Ashe's arrow is an amazing initiate. Isn't that why its up there, Tier 1 :)

Looking a lot better already :)

Anyways you could add some more items and explain why/why not to buy certain items, and possibly who you like to lane with if you can't get mid for some reason.

Sorry but there's too much wrong with this guide. Even after the rework your CDR calcs are still wrong, and you're suggesting to burn 3 ults to kill 1 person to make a 4v5 teamfight?

Rework Done
Swapped GLyphs of Focus for Shielding
Removed Deathfire Grasp and added a note on it(if its needed)
basically reduced the CDR to around 41-41%
Once again,
THANKS FOR THE FEEDBACK!

Mmph>.< agree. Thanks all.
Wait..Reworking>< Anyways what I actually wanted to say(but forgot) was that I usually do not buy DFG, and if I did would sell my boots. Oh well. Forgot :(
Time for a rework><

This build great for those who just wanna fire their lazers ^^
But you should never leave the others skill without curiousity.
"I'ma firin in mah lazor"

when i saw your itemsbuild it was enough what do you want with more than 40% CDR? it doesnt work..
better get zhonyas or rylais

Some small things that I have noticed:

You have about 65 % CDR while 40 % is the max. You might want to take a look at that. Along with that, you also want the Utility Mastery for holding the Blue Buff longer, which would bring you at 87 % CDR or so... such a waste, in my opinion.

It might be better to invest in Archangel's Staff, Lich Bane or Zhonya's Hourglass, or any item that gives AP but no more CDR.

Why do you level Light Binding before Prismatic Barrier?

Also your build has 7 core items, so now the site thinks you sell the first item (CDR boots). You might want to look into that :)

Concluding, I think you have made a good start, but I think it's not finished yet. Good luck with upgrading/expanding it, feel free to PM me if you want me to check it again ;)