They are women fighting monsters that are bigger & stronger than them. Can't expect much more. Besides, sometimes Kiva/IXA get whipped pretty good. Seeing their roles in the organization, I think they are both good. After all, they both save lives anyway by coming to the scene, shooting/whipping the fangire, & getting beat up still distracts the fangire from killing someone else. & stalls long enough for Kiva/IXA to get there.
How so? Have you been watching lately with Megumi all the time saying "I must carry my mother's will. I understand her feelings better than anyone. blah blah blah" *jumps rook every chance she gets*