An arena for unprecedentedly accurate skill assessment – a skill test.

Well, damn, if wings break OH, then the air book breaks it, and the orator's hat breaks it, and the scholar who gives you fly also breaks it. By the way, IMO, there's a certain charm to manual attacks. Blue has an advantage because it attacks red, and red has the opportunity to choose the battlefield. Professional skill testers already remember where the most challenging landscape is.