When I went to the Booster Tower at the top, I reached the part where Valentina and Booster had a conversation. Sure, Valentina didn't move and the Snifit's GFX were all screwed up, but Mallow decided to fight her.
I had these items equipped: Iron Duke, Crystal Mail and Wake Up Pin.
I also had 4 kerocola - 3 and 4 hyper m guards. Even so, she showed no sign of defeat. How strong is she?