There was one scene when Archer v Shirou and all the shonen preaching started going on, Saber just stood there like an idiot - when she could have gone and went looking for Rin. Even when Gil appeared, she was still pretty damn useless.

Another idiotic moment before that, was when Rin took one whole minute to make a contract with Saber - and Archer just stood there and watched it happen. What a moronic series of events.