Never.
30 fps with nothing.
6~15 fps with recording
Imagine that ^ + fake shaders.
I don't edit any shit without at least of +59 fps.
Plus: This event is a little hard, to got a good idea and be able to mix the song with some original theme or replays and effects making an epic video....
In this style is hard to do, unless you alredy got the idea (when you got a request, you got to think more, but if you are inspired and imagine how will be the video, it's easier to think about it and make it.)