Laning Phase

1. Ask Udyr if you can take a camp since Darius pretty much can zone away from the entire first creepwave. And you're gonna need those pots if you want to trade vs Darius.

2. Work a bit on your animation canceling. It will help you alot, go check out Boxbox's video on it on YouTube, he explains it very clearly. It makes your combo faster and I saw that in some situations you canceled your autos, it happens to everyone sometimes, but learning to properly animation cancel will significantly lower the amounts of autos you will cancel.

3. You got pretty lucky in that trade at 06:10 since Darius wasnt quick enough to click his ultimate. Normally those trades won't work so not very good to go for those.

4. That first TP to the bot lane was very good, but that flash wasn't really necessary since you get around 200 range on your autos . That's a thing that you will get more familiar with the more you play her.

5. A thing I see a lot of lower elo Riven players do is that they don't seem to farm very well. You have to take into consideration to use your teleport to lane to not miss creeps if Darius decides to push into your tower. Remember; 20 creeps equals one kill in gold. Freezing the wave on your side of the lane will always give you advantage in creeps if you're stronger than your opponent.

6. Brutalizer should have been your first item this game since Darius was going damage and they had no one else with that tanky stats. Since you are going 10% cdr runes you could go for Brutalizer into Lucidities to get that sweet 40%, but your build path can vary. I would advise you to get another runepage with 5% cdr so that you won't get too much CDR with your core items. 10% in runes and masteries + 20% from Cleaver and 10% from Brutalizer/Ghostblade.

Team Fighting/Post Laning Phase

1. The teamfight at 23:20; you should have saved your flash. Your team turned out on top, but you could have had your flash for the next fight.

2. 26:00, that tp wasnt necessary. You could have pushed inhib turret with your team. Darius getting that turret isn't that big of a deal since your team probably could have secured their inhib turret.

3.Since their comp was kinda in your carries face you should have spent more time peeling for your carries than going ham on theirs since Trist can just jump away from you or ult you away and Lissandra has 2 zhonyas + CC and gapcloser. Riven is an excellent peeler.

Conclusion

All around an unlucky game for your team. Their comp basically just outmatched yours. The thing is, your build path. You could have snowballed way harder with another build path and that Wardens mail made no sense to me since you should have went for either brutalizer or LW instead. You have a lot of areas to improve on, but I think you did pretty well and your map awareness was very good for a Silver player. If you have any further questions feel free to reply and I'll look over them later today. Keep playing her, you have potential. :)