I have tried and tried to compare to other players in chaos squad, but can't quite tell.

Grinding and boosting with no jumps might be the fastest, but I think it might be grind boost, jump boost grind boost.

the execution is tough. you need to jump a few frames after thengrind boost ends,but the jump needs to be very low, and you need to get the air boost on itsnearliest frames too. then you can just buffer the next boost before you grind which is easy.

but that might not actually be faster than just grinding and mashing boost, and I would really love to see if any one knows