"Okay, so we're in agreement that you did not hit Hagbard with a spell."
As for who's lost the most, I'd say that I've lost the most, considering that I've lost
A) My cohorts and all their spells
B) My animals and all their attack
C) All the actions and spells I put in to my Cohorts and Animals
Of course by this point, I think that one of us is going to be dead this round or round after, so it's pretty intense.
Well, I've lost two cohorts and everything I invested in them. Your animals only count as character features, magic items or spells, depending. Overall, I think you have probably lost a little more, mostly depending on how much resources you have expended (unrecoverable) in magic items and spells so far.