Really good video. Just some concerns I have, and it's not meant to shut you down or say your content isn't correct.
But from that small snapshot of the arena defense and your stats I'm wondering if he would be as effective in global. The arena defenses I see in global champion seems much beefier than what you shown. And my arbitor is around the same stats as yours but slightly more attack.
I'm kind of on the fence whether to recall mine or not. Do you think he'd have the same effectiveness on global? My offense winrate hovers around 65-70% which puts me mid champion tier, but I'm more concerned about defense where I think he took a huge hit.