I wanted to write that a typical walljumper as is me succeeds in about half of his attempts, but I decided to not post any data I didn't confirm before. So I went to battle1 and started to wall jump the most left wall.

Results after 50 attempts:
25 fails
12 single wall jumps
9 double wall jumps
2 triple wall jumps
2 quadruple wall jumps

Edit: Btw, I know no one asked for any random science data but I wanted to raise my self-esteem say it's not really that time consuming if 50% of the time it comes out successful. The above data means that on average, two attempts are needed to perform any of RF climbs in semi without RFs, and about 13 attempts to climb to the top of a medieval skyscraper.