they talk about all this stuff on their site. if you have high arches and tend to roll ankles outwards, they suggest you NOT get the ones with arch support.
"HIGH ARCH
You need an impact absorbing insole without arch support to combat Supination.
Supination
The exact opposite of Over Pronation. Your arch is too high which causes your ankle to roll outwards upon impact.
You tend to roll and sprain your ankle
Get heel bruises
More likely to break your ankle.
Because your ankle leans outwards, orthotics/arch support will generally be ineffective. Most impact is sent to your heels and forefoot so you need as much impact protection as possible. This is why we have specially made our kingfoam insoles series for you."
also RE: braces, i used to constantly roll my ankles and i was constantly wearing braces and hightops. I'm on low or mids now and no braces. Eventually got around the psychic crutch of needing to be in my braces to skate, and i rarely fuck my ankle up anymore, and when it does happen, it's way less severe. but maybe just due to being way less fat than I used to be.