K11 takes this mid-high diff. Some will die however. Shikamaru is going to be the big key of them winning this fight. When the power house Lee uses the 5th gate on her, that enough is going to keep her occupied. Then Neji and Hinata can over come her strength with their superior Taijutsu and more than likely hit some of her chakra points, while can prevent her from even using Ninjutsu.
If and while she's dodging 5th gated Lee, Neji and Hinata's superior Taijutsu, Tenten and Shino can ambush her with shit loads of shuriken and bugs. While she's dodging 5th gated lee, Neji and Hinata's taijutsu, Shino and Tentens ambush, Ino-Shika-Cho are going to be coming up with an outstanding plan to defeat Tsunade. So if Tsunade get's passed all of them, Sakura and Kiba can provide back up for when Ino-Shika-Cho move in and restrain Tsunade, then it's game over.
Neji hitting Katsuyu's chakra points will more than likely make her unsummoned or disbable her from using her jutsu. Lee can simply keep pounding that damn slug while Kiba transforms into that huge dog like thing and take Katsuyu out.