Forget Phantom dancers and Greaves, get boots of swiftness or mercenary treads, and 4 B.F based items are tooo expensive, you need 2 cheaper AD items brutaliser is good for eg.

I like the build, but you might wanna switch out the Phantom Dancer with another DPS item since you can make your HSS even more of a killer. If you're ganking, then usually, most of your DPS will be from your WEQ combo since the enemy will normally run when they see a huge flashing circle on top of them. Also, i think that you should level Aegis of Zeonia at lvl 2 since the early game stun will be good enough for a worthy kill if you're with a carry, and the HSS farms minions with terrible mana efficiency. Besides that, ok build.