Scoundrel is not crit chance, it is crit damage. So leveling it further does indeed up your damage if you crit. Which means if you crit, 1 point in scoundrel is doing 5% crit damage AND movement speed while 1 point in ranged does 5% damage. Seems like scoundrel is objectively better to me
Enraged lasts the turn you cast it plus one more, if you cast it on yourself. If you are lone wolf starting your turn with max ap and have some ap boost abilities, this means 6-8 guaranteed crits depending on if you use 3ap skills. You will always do more damage than if you did an extra a 2ap move instead of enraging yourself, unless your crit chance is INCREDIBLY high. You are of course muted but that isn't an issue if you planned on just using weapon skills and basic attacks that turn anyways
