It doesn't quite get the job done without an XP pot to get you to 6.
Ran every quest lvl 1-3 as a ViP on elite only (missed Bravery only on one quest - STK pt 1 - we had a lvl 6 in the grp).
Running the quests lvl 1-3 all elite max Bravery with no farming gets you just shy of rank 24. That's two dot's away from lvl 6.
Close, but not quite. Also note that some of the chain quests screw with Bravery Bonus.
Catacombs is all lvl 3 - cool.
STK is 3-4-4 - okay...
(edited) Tangleroot is 3-3-4-4-5-5-6-6-7-7 - that is going to make Bravery streaks interesting!
I am not sure if anyone else was as interested in getting to 20 as a double TR as I am without repeating a quest (we knew it couldn't be done, I just figured I could get past lvl 6...), just putting it out there.
Edit: BS at 46