TIP: Help others raise their Arena rank.

It appears as though losing Defense battles does not lower your score. If everyone sets their Defense team to Lv1 characters, it helps others to increase their rewards without really hurting yourself.

I am unsure if this changes in the highest rank so if someone wants to report their experience there I'd be curious. But I'm currently in the second rank (purple badge) and have confirmed I didn't lost points after 5 defense losses.