Ezreals, it is time for a new era
Return of Blue build. Blue Build 2.0
->
/ 
or
->
/
-> 
Get
whenever
That's your core. After so you decide if you need
or not, if you don't grab
/
then grab
, then build whatever you think you need.
Go 21/9/0 or 21/8/1 (The 1 being that recall skill, I kind of like it.)
Runes are basic
Reds: 9x AD Yellows: 5x Flat HP and 4x Armor/9x Armor Blues: 5x Flat Magic resist and 4x Mana Regain Quints: 3x Life Steal/3x Armorpen/1x AD and 2x Atk Spd/3x Atk Spd/3x AD
This build is weaker early game, but stronger Mid and Late game in my opinion. Activate Muramana when you're about to fight champs or about to fight for an objective (Drag/Baron/Blue/Red). Don't use Muramana on Minions, it's a waste of mana. Unless you must save a tower or something dire.
"This is trash"
Okay, except if you look Koreans already are doing this: http://www.probuilds.net/champions/Ezreal?region=KR http://www.probuilds.net/guide/KR/1458997007/1257110
Also Blue Build 2.0 in action, by C9 Sneaky: https://www.youtube.com/watch?v=NF0qmzej3zs