I have done all new dungeons and yes Brayflox is by far the fastest way, easiest bosses. We did it with bard monk combo. but any combo works well. do it in like 14-20 min depending on the amount of "slack" in your group. But atleast for the 1st 3 weeks I would recommend doing it with people from your FC. Because if you go with duty finder you end up with people in darklight/ilvl 50 going: Whut to do, me new here dunno tactics. And then you do end up for 45 min in there. it's 10 runs of brayflox to cap your soldiery each week. 1 run 15 min so 2,5 hours each week. seems really reasonable.