I'm following this series so far and I have just finished reading up to chapter 385. I like the MC's journey on his way to become the most powerful Kamen Rider.
I believe this was a very good Fanfic. Although their were some plotting that were missed it was mainly a wish fulfilling story. As the end of the day it is Fanfiction, story made by a fan, not the real story.
This series is a bit of a World of Film to play with. The list must not repeat the same thing mora than twice. It's a bit of a World Cup on the Fusion of the fictional world