BRD's songs really should work on themselves. I think part of the issue with BRD's party buffs is that they're sort of ill-balanced for group content in a way that tends to just make it better to bring a DNC most of the time. Maybe increase the DPS buff for DPS somewhat while having healers and tanks be affected differently? Like having an MP regen or vuln down buff applied instead. I don't know, something to diversify their utility a bit while still allowing their damage to be raised without it being overly imbalancing.