I prefer group3:
Stack BD for trash, switch to MA for boss, clear in 20 minutes
So far I've only gotten to mess around a little but BD AoE is insane, and we get yet another AoE skill once the cap is raised I believe. BD also gets a self heal at the current level cap which is awesome. If it lets us sit in stuff safely that'll make up alot of boss dps.
Need to mess around more with a bard in the group though. Trying to figure out how to gear up the BD too. Building up double/triple hit and procs that work well with them seems key. I'm hoping that a bard and the right gear puts our single target in a good place too.