Ramparts - definitely. I just, within past month got 2 teams to 60 (2nd one within last 2 weeks), and while I did Strat (not Scholo) I went to Ramparts at 55.
5 1/2 to 6 clears I believe. If you have a well geared 80 it's so fast.

Kill the mobs on the bridge, and about the next two groups, then move your alts to the middle of the bridge.

IMPORTANT!!!
Maybe I was doing something wrong, but I clear every mob EXCEPT Vazruden and Nazan. Nazan's flames hit your alts, even if they are on the bridge. (Never tried moving them to middle of zone, didn't see it worth the time.