I think this explains itself pretty well; in every level you must do at least 1 wall jump.

Do y'all think that would be a good idea?

For a route with warps I think you would get:
1-1 with the first pipe
1-2 with a pipe in the warp zone
4-1 on a pipe somewhere
4-2 on the floor with the gaps at the start
8-1 in between one of the jumps
8-2 on the wall at bbg
8-3 on the pit right before the flag
and 8-4 normally

(note: I am a beginner, and this route might be completely wrong)

I'll try TASing that route