I say Team 1. Why? Because against Sasori, Tsunade can go on her own. Sakura is a chuunin that's why it took her so much to win over him and she did it because she had Chyio as well.
Tsunade having a more advanced experience in battles, the ability to read patterns, her strenght+techniques and ability to read movement patterns as she learned Sakura to do it, not to mention that her chakra pool is way more than Sakura's, given her lineage, I believe she is ready to take on Sasori.
On the other hand, I believe as well that Gaara has the power to take on Deidara. The type of offensiveness he has and as well, the defensive, grants him the ability to overtake Deidara. We know that at the time given, it was plot-wise movement from Kishimoto plus he had to worry about the villagers. This is taken out of consideration as he only has to worry about himself now given the fact that Tsunade is a medical nin and her techniques make her invincible up to a certain point.
Both being former jinchuuriki and the succesor of Senju/Uzumaki clan, they have outstanding chakra reserves tha can make them last longer than the other two.