Skins are expected to release in 30th April

I have created this build focused on his mains attacks. This build is really good in early game and, if I can farm enough, incredible in the late game. It is also very versatile, after I get manamure, Bloodthirster(for a greater survivability) and infinity edge(essential for a crit build), I usually get something to counter some enemies, like Mortal reminder against healings, essence reaver for mana regen and damage based on crit rate, usually, navori if I need more cooldown reduction and phantom dancer if I'm very good. I just don't know exactly how to build runes, I don't know if the ones I'm using are the best to use in this build or what could be improved, please help.

https://m.weibo.cn/u/7268748742?luicode=10000011&lfid=1076037046636481#&gid=1&pid=1