imo, salvage is actually one of the better end game activity. no need 18+ people, not need to camp 3hr NM, no need to wait until people finish the zone, no need to spend 3hr in zone, etc. other than the next to 0% drop rate for 35lvl item, its not too bad. its just requires 100 minutes of full attention, non-afk, style of playing, a lot of dedication, and patience of a saint waiting for item to complete.
i don't think going once a week will be beneficial since drop rate is not very friendly, could take forever for pieces to drop. if you can make 3 or so, let me know. its nice to have a static group so can work out kinks and whatnot as to improve.
(the body piece is insanely expensive, but the other are manageable to a point)