The smurf Just Happened?

I was playing FFT, attempting a second round of the same battle I had won previously but made the mistake of not saving and... well if you've played Tactics you know what happened, and events went ridiculously out of control.
In the first battle I had no losses whatsoever, not even a close call, the same could not be said for my poor Timemage and Wizard this round. Perhaps it was the fact that I double layered the dragoon/knight battalion with Bahamut and Meteor that made them go battrout crazy on me. Idk, but tell me of a time when you were completely befuddled with AI enemies (or AI in general) that you'd hade no trouble dealing with in the past.

Gamer faux pas go!