Quote Originally Posted by Rengori
Just keep him with enough health to not hide. Or Berserk him so that when his health does get low he'll hide and still attack.
Generally speaking 'Zerking Ed is not a good idea. His Hide ability is one of the most useful, and he tends to go a bit...mental once Berserked. It's always best to have full control of him at all times, especially when levelling up.

O and thanks for the poem Acid Raine. That was killer. Keep at it though, and be sure to read my walkthrough about this very challenge (that Gamefaqs still hasn't posted).