Although paramedic skills are often used, it's relatively rare for them to actually make a significant difference towards the casualty's welfare or recovery. You're better off having someone who is a competent and capable helicopter crewman on the wire rather than purely a paramedic. That way sound airmanship decisions will be made by the winchman during the rescue, much to the relief of the remainder of the crew who are reliant upon him coming up with the goods.