Ahhh, insomnia.
I was playing around with Raptor Mazurka with NIN/BRD; not saying it's conclusive, but by eyeing it with a few friends hanging around as MNK/WAR and RDM/DRK, the hate gain is pretty gross. (With Raptor hitting 2 people + myself, /DRK couldn't get hate with Last Resort/Souleater - although probably would have with some melee.) Raptor has a really darn short 24 second recast time, decreasable further with spell/gear, /BRD in itself has a couple of fast-casting songs for minor hate gain between everything else.
Seems nice on paper... has anyone actually tried it? I can't really think of a real-situation test for it I can actually setup myself, so I'm throwing it out there to see if anyone else has thought about it.
Only thing I can think of that's awkward is that despite it having 24 second recast, Raptor has a 4 second cast time. Resisted Lullaby giving less hate would probably be bad too, but I don't think resists decrease hate on anything else, so probably not here. Probably.