Yeah there's a cycle to it. I'll try and describe it. There's five bullies. Going from top to bottom let's label them 1 through 5. From the start enter the 5 Lane and get as close to the right as you can and then Dodge the bully with R2. You should now be in lane 3 and pushing the loader. The 3 bully will be faster than you so expect it and Dodge down into the stream of vibrance as last minute as you can. The stream should make it easy to go left so go as far left as possible but be quick about it because you have to keep space between the four bully. Then jump back into the 3 lane to get the 3 bully to move that way. Dodge the 3 bully with R2 to get into the 2 lane, moving to the right. Again, you want to be quick so you have lots of space from the 2 bully. The 3 bully will be moving left and has momentum so here is where you have time to re-enter the 3 lane and push more. The 3 bully will change directions and you repeat.
Depending on how much space you have it takes like six cycles of this. Its basically just a circle of juggling the 3 bully back and forth. If you die you have to start over which you can do in the menu but you'll never run out vibrance. If you get it to 100% but then die you don't have to do it again.
I also tried cheesing it from the back but it never worked. Hope that makes sense.