This is a build with pretty much dmg, but the Frozen Mallet and Guardian Angel makes u a little bit more tanky. But it happens that u can't do something against the off tank or tank that have build a lot of armor, so if that happens to u i recommend u to build the Black Cleaver or the Last Whisper instead of a second Bloodthirstier.

This build will make u to do a lot of dmg and still stay alive in team fights!

If u getting rly hard pushed on top lane and the enemy harass u a lot I prefer to max my "E" skill and try to farm under turret and when the enemy cast a spell on u then u just use your "E".

Riven is a rly easy champ to farm with, use your "Q" and "W" and u take all the minions, but remember that "Q" and "W" don't take so much in the early game so i recommend u to just last hit and don't try to push, But if the enemy's minions came to near your turret shall u push them away a little bit with "Q" and "W".

Most of your teamwork early is with the jangler tell him if there's any wards or something, and it's u that r going to make the first attack not the jangler use your "Q" and "W" then the jangler came and do he's work.

Late game r u and your tank the players who gonna stay first in your team, always ping the enemy that your team will focus. Tell always your team if u gonna tower dive so they know what's going on.