Yes, selamectin (Revolution) is a great choice for treatment of mange. It is much less dangerous (lessor risk of overdosing) versus ivermectin, but more expensive and harder to obtain (requires vet Rx). Ivermectin is sometimes used as it is more readily available (can buy off the shelf at places like Tractor Supply) and less expensive... if the option of selamectin is available, I would always go that route!
Thank you for helping this squirrel!