Yasopp's rank on the akagami pirates; will usopp be as strong as him?

so i was re-reading the manga and i saw something that got me thinking. Usopp's mom said that she believed usopp was going to be as strong as yasopp; so i was wondering, how strong is yasopp on the red hair pirates? Is he the 3rd or 4th strongest? Or is he one of the weaker members of shanks's main crew? and will Usopp really be as strong as yasopp? If this is true, will usopp be 4th...

Yasopp's rank on the akagami pirates; will usopp be as strong as him?