Guren has no feats to suggest she can touch Sakur or Tsunade and come back aliveIf Guren touches Tsunade or Sakura once, they die through crystallization.
Guren can crystallize Mei's lava, acid, or water. Without her ninjutsu Mei's useless.
Guren crystallized Shino's bugs before they even touched her. She could do the same to Konan's paper and send it back at her.
Apart from Kaguya, the only female I can think of that might possibly beat her is Kurenai. If her genjutsu works then it's GG. I guess that the female Jinchurikis would all have a chance too.
Guren gets Blitzed
XD