To be honest, Brayflox is the only dungeon I would specifically farm for its gear throughout the leveling process. It's only 3 specific sets of gear that you're after in there (Cavalry, Infantry, Battlemage) so it's not TOO hard to acquire, and it pretty much lasts you until AF level (45-50).

If you obtain enough GC seals though and you are still having no trouble staying ahead of the leveling curve for MSQ, I'd say sod that and just use GC gear.