I will prefeer a bit more argument on your downvote,
You seem to dont understend my idea, about first survive and then deal damage,
Lets put it simple, You are lanning against Xin Zhao and Ashe, You cant ingate and use your combo if they deal more damage than you, and that exactly what they are going to do,
Ninja tabi gives you Dodge and Defence, you need it against heavy dps like xin zhao, yi, and others, They really **** you up, because riven is squishy, for being a full melee champion
Also, it lets you dodge minions attack, With you being a melee you will sometimes get caught on hard situations where you will take some minion damage, Due to no sustain if you dont buy a vampiric scepter, Minimize the amount of damage you take, will lead to profit, everywhere
You seem to dont understend the sequencing aswell, This buy is meant to play defencive, And with level 2 or 3(depends on your runes and items) on broken wings and ki shout, you can farm really well minions wave... So, if you are going to play defencive, you need to farm, and the best way to farm, is doing THIS skill sequence, sacrificing some damage, So Phantom, take a closer look to the build and its goal before downvote, Please understend the guide... Anyways thanks for your comment, I will make another section on the guide explaining why prefeer Ninja Tabi

Your skill sequencing needs a little work, and Ninja Tabi...

Thanks for your reply, Yeah, the idea of this guide is erase Riven's problem at early, the problem of this build is that you sacrifice firepower at late, its just a matter of tastes, Again, Thanks alot for the first comment

sorry for the double post didn't see the thumbs up button lol

So i tried out this guide in my previous game. I had previously thought of going for trinity force but never managed to convince myself to do it because of the stats on it. Glad I tried it out, really helped me up my game. I went 7/2/7 in the game while midding against a morrigan. Would have been more, but I just could land those final hits, but whatever. Honestly one of the better builds I've tried out, I don't have the exact rune setup, as I run arm. pen marks, armor seals, and flat mr on glyphs. Curious to try it out with your rune set up sometime. Thanks for the link to the guide, I'm probably gonna utilize it more since I had such a successful game. Good work imho.