This setup is made for Riven to be your basic warrior character. Meaning you are able to deliver and receive damage. Your masteries and rune build is a very aggressive early game setup. If you use this setup correctly and get ahead early game, making your build shouldn't be that much trouble.

While having your slight tanky build, Riven is able to defend turrets more efficiently and able to turret dive at lower levels then more champions. Tho try not to get to bold.

I find pure AD or Pure tank Riven does not get the job fully done making her either to soft and not being able to stay in a fight, or to weak to ever get a kill even with her ult.

There are of course other hybrid builds out there, but this is the one I have found best in my own playing style. Hope this helps you guys in either having a better understanding or giving you ideas on your own hybrid build for her.