isn't there another one of these threads floating around here already?
Oh well...
IMO, just gather up a couple of toons and pull the hell out of Dranik scar... you don't need to bother with expeditions or anything unless you're doing some warping, heavy macroing, or the zone is already populated with folks doing the same thing. You can pull the entire zone of all faction mobs in 2-3 pulls, depending on how many your main tank can handle. When I did it I used a very well geared SK, cleric, and bard... was trying to get the bard (and to a lesser extent the cleric) the necessary faction. With guard/rune procs and the spells of the SK, I was hardly taking any damage (and this with about 40 mobs on me).
It takes a while regardless... I was here doing this for a few hours a day for about 4-5 days before I finally got max ally.