Would like to know the best build for ezreal in s6. Or pros/cons for the different builds

Blue ez, that fucking slow on hit is to God damn annoying

Blue ezreal is good if you know how to use it, but it's shit early game and lackluster late game. It has really strong power spikes that you have to take advantage of and win the game off of. Practice normal adc caster build (like a lucian) ezreal before trying blue ezreal, and even then you should probably wait until level 30 since you're still probably grasping the basics of the game before learning about item spikes and new matchups.

Sounds like a bandwagon flavor of the month player to me.

Regardless learn to Google. In less time then it took to write that out you could find entire sites dedicated to builds and not have to wait for replies. Those sites exist for a reason.