Suggested by Sonic Tobirama is one of the original Hokages so his power level is considerable. That said, as strong as he is the guy is still outmatched by Kabuto. Kabuto was already powerful before he absorbed Orochimaru’s abilities. After that the guy got even more broken to the point where he is one of the toughest fighters in the verse. Senju would not be able to keep up. Kabuto wins.