When I tear-up enemy gyms, I always select my favourite pokemon as the initial defender. He has only 500-CP. Sure, he is defeated soon after, but that is ok. He is my buddy. I want him to have the glory. And, I have no clue about how to defend gyms... it seems to me that picking a high CP pokemon makes no difference and wastes potions.
So, can I make my low CP pokemon the lead defender of a friendly gym? If I battle with one of my 2000+CP pokemons and defeat everyone in a friendly gym, could I make my 500-CP the top defender? So everyone can (briefly) see him at the top? Or, is the order of defense only based on CP? Ignoring HP is ridiculous, but whatever. CP decides the order of defense?