Razor is simply amazing. Able to snowball out of control and so much fun to play.
You can build him as dps, as a racecar or more tanky. This build is very consistent for having good ganks and good team fights... Remember not to waste your link with using in on an enemy who is running away right after casted. You should always focus the enemy carry with the link. When u get ganked, remember to steal damage and try to turn it around if it is a 2 man gank, if its a 3 man gank u just wanna run, and if u get ganked alot, put one point in your passive. Keep an eye on your surroundings, cause Razor can battle anyone 1v1. He has good counter push and with scepter, amazing push aswell... He has quickly become one of my favorite heroes. I suggest u to try this build out. It is very strong and very consistent and a whole lot of fun.