The AI was unusually competent in Hyrule Warriors the other day. While I (playing as Midna) was bogged down dealing with an opposing Sheik, a mere Hylian Captain handily defeated another enemy that I hadn't even realised was around:
So I left Sheik alone and went off in search of keeps to conquer. This worked out well:
It makes a very pleasant change when your AI allies can be trusted to fend for themselves.