Board Thread:Theories and Speculation/@comment-26388300-20160316175437/@comment-26104757-20160323112205

Definitely.

Her role would've been primarily a support aid — ensuring Jiraiya's health would be able to perform at an optimum level with only one arm in use via Katsuyu's attachment.

But even then, with the use of Jiraiya's array of jutsu's and the aquired Toad Sage Mode — I'm certain their team work would benefit in a way where he'd apply appropriate openings for Tsunade to lay in with collateral attacks.

In the very least, Tsunade's help would've ensured an escape route.