Remember, BRDs will be nerfed really soon.
And today I downed Titan HM twice in a row with no wipes without using Mage's Ballad.
I think I can actually replace the WAR with a BRD, to get some buffs, but don't they cost 20% dps dealt by the BRD? This is not such a good buff. I don't really know, I am just archer lv16, but I think I heard that songs cost 20% dps.
I don't sell Titan runs (I don't like getting bad people geared, but that's off topic), but I can say I have good knowledge about this fight, and I suggest [WHM + SCH + melee DD + 3x-4x BLM + 0x-1x buffing class]

As melee DD, I suggest DRG since it will be strengthened upon A Realm Awoken release (12/17/2013), but until then it's the same (I am only WHM so I don't know perfectly which is the best Limit Breaker)