This item build will give you an average start on your match. this build will not work perfect before in early game "15-20 min depends on minion slay and kills"

This is and build i tried first time as riven, i tested it against bots and got a 26-5-11. first time against players i got an 14-3-4, this builds give me an great advantage in late game. i have enough HP to survive a gank 2v1 " or 3v1 depends on oppenets" with great damage, armor and attack speed you will easly get an penta kill in team fights. ive only got an tripple in teamfight but i think it can be easy to earn that penta kill u want :) i dont think riven is the the option for jungling, but it is possible to jungle with riven. riven is an amazing laner and can easly gank if its needed. high movement speed and damage will make ganks to funny play : )
Using your Q spell to chase or flee is a good option! The Q spell make u jump fast and give a good advantage. this build will also make u a off tank and if u ask me off tanks is the best option in the game.

This masterie page give me attack damage, armor penatraion and armor. this make it easy for me to take out and tank within few seconds. this will also make u an off tank and that is an great advantage in game.

This rune page will make tanks easy targets and make you the most feared on the battlefield. and i think everyone like to be feared on the battlefield ^^

flash: Flash is extremely useful for closing the gap on enemies if they're running away, or for jumping over walls to escape from salivating enemies vying for your blood. Flash is a must have on all squishy champions with no escape mechanism

: But why Exhaust?
______// Exhaust is vital for any ranged AD carry. Melee DPS is naturally far stronger than Ranged AD carries early game, and even mid game.

______Say it's a 1v1 against you and Tryndamere. Who would win? Tryndamere, hands down. What about you versus Master Yi? Master Yi, hands down. What about you versus Lee Sin? Lee Sin. Riven vs Nocturne. Riven vs Nasus. Riven vs Renekton.

______All would win over you. Exhaust:
1) Reduces target attack damage by 70%
2) Reduces Ability/Item damage by 35%
3) Slows movement by 40% for 3 seconds

______ Exhaust gives you a chance to:
1) Run away if necessary
2) Chase
3) Shut down the enemy Ranged DPS carry
4) Shut down the enemy Melee DPS carry
5) Shut down the enemy Ability Power carry
6) With the upgrade in the offense tree, you also lower armor and magic resist for your team to utilise.