With low i80's gear (extreme primal bow, so that bumps things up a bit), using all buffs on cooldown, I get ~260dps sustained on a stationary target. On a fight with some mechanics, like Titan Ex, its closer to 220, and on fights like Turn 5, where you have to save cooldowns for specific mechanics, its lower than that (technically higher because of Phase 3, but I don't really count that).
Every class played perfectly, bard should be doing the least dps. Part of that is because they have support abilities, and part of that is because bards are easier to play. IE, a mediocre bard will do more dps than a mediocre monk, but a great bard will do less than a great monk.
I might not suggest using a monk right now, for the reason that greased lightning is hard to manage with RB. Perhaps when a good monk routine gets made things will change, but I would recommend going with a dragoon for now.