The Senju clan's survival introduces a plothole.

[Nidaime Suiton]

Without Hashirama and Tobirama and the Senju girl who mastered Genjutsu , Senju would have been very weak.

Uchiha base > Senju base

 

[Uverdore9]

Senju do have some talents but all of that is negated by sharingan's copy technique. Hashirama has landscape altering powers so that's probably how they took on numbers.