Dharp songs are weak anyways, so doing 2x Minuet with dharp on won't really change your DPS by that much for the time period.
Sorry but I dissent.
Not questioning the fact that Ghorn songs are much better
of course, but Daubla songs are not as bad as you make them sound.
If anything, they're much better than they used to be.
Minu 4+5 with Daubla = 329 attack
Minu 4+5 with G_horn = 424 attack
Both these values will get multiplied further by all effects that boost Attack on a % base (Smite trait, Berserk, Warcry, Chaos Roll, etc etc)
You need to consider that Daubla songs now get Minu effect +4, before they used to get Minu+1 only, that's thanks to the new Neck. (difference with Ghorn is still +/-4 of course).
Also you need to consider that some time ago most songs were buffed in their basic value.
My point? My point is that Daubla Minuet songs nowadays probably give the same (actually I think much more!) attack values than Ghorn songs used to give like 1-2 years ago.
Would you have said that 2x Ghorn minuet songs were useless, 1-2 years ago? I don't think so.
tl;dr
Ghorn songs are always better, but this doesn't mean that Daubla songs are irrelevant or don't matter at all.