The Hollywood-Medigun / The Nest-Smoker
+100% uber duration
+60% healing range / healing rays follow around corners
Uber only applies to patient
It's main function would be to clear out particulary nasty sentry nests. The longer/more flexible healing ray would allow for the medic to generally stay safer and keep a distance to sentries, while the ubered patient goes in and becomes their main target.
Obviously, that means the entire team will focus on the medic, while the patient is too busy shooting 3-4 sentries. It's easily a terrible idea, but after the Meet-the-Medic trailer, I keep wondering how it would really play out if the medic stayed vulnerable.
Alternative:
The One for the Team (medigun)
-50% uber duration
+30% uber build speed
Uber only applies to patient
Medic doesn't need to follow patient once ubered
Short uber bursts allow the medic to bust someone out of a ditch, or for that player to keep his medic and teammates covered, while the medic can tend to the others. This doesn't allow for strong bursts, but might be more useful on defense. But probably isn't.