Unless you plan to give us the ability to do more dps (a lot more would be awesome I mean I'm a scout I have daggers and everything) than this needs to be altered to either
a) record the group/raids total damage and proc a percentage (at least of 10% of that on the group/raid
b) record the bards total damage and proc that complete amount.
When this spell came out it was bigger than mimic now most bards don't use it because it is hard to get a bard to do damage which means the proc is useless especially for troubs who are often grouped with healers and mages who have much longer cast times that scouts and tanks that are covered by dirges. Lets get it back to the point where we could in the right circumstances have people procing into the hundreds of trillions for 11 seconds. (total not individual hits I'm not being unrealistic)
a) record the group/raids total damage and proc a percentage (at least of 10% of that on the group/raid
b) record the bards total damage and proc that complete amount.
When this spell came out it was bigger than mimic now most bards don't use it because it is hard to get a bard to do damage which means the proc is useless especially for troubs who are often grouped with healers and mages who have much longer cast times that scouts and tanks that are covered by dirges. Lets get it back to the point where we could in the right circumstances have people procing into the hundreds of trillions for 11 seconds. (total not individual hits I'm not being unrealistic)