Lullaby

Ok did a small test.
This is the set I currently use (max duration) for Horde Lullaby II

Brd Lullaby String

ItemSet 372127
Cape is CHR+20, Macc+30, FC+10.
It's 489 String skill with Daurdabla(skill range tier is 486).
Not sure if it's really BiS since I haven't updated it in a while (except the new earring) but should be pretty close to BiS I guess.
With Blurred Harp+1 you would need at least 17 String Skill from somewhere else.

Can get:
+5 on waist (small macc loss)
+4 on back (HUGE macc loss)
+3 on sub if you're /NIN or /DNC (huge macc loss)

That's it unless I'm forgetting some augmentable thing.
So yeah, not possible if you want to keep the same duration.
If you don't wanna keep the same duration the smallest sacrifice is Body.
If you equip Brioso Justaucorps +3 in its place you lose 12% duration and gain lots of macc and +14 String Skill.
Just Body and Waist would be enough and you would get more or less the same macc, bit more probably.

But all of this for what reason? Let's move a few steps back: to benefit from Blurred Harp +1's bigger duration (10%) over Daurdabla, and still mantain the same range.
But to do that you lose 12% duration from the body...



Conclusions:
Blurred Harp +1 is imho not particularly worth it.
If you want max duration and you don't care for range ==> use the set above (or similar) and Marsyas
If you want max duration AND range AND duration ==> use the set above (or similar) and Daurdabla (~2% more duration than Blurred Harp +1)
If you want max Macc and then the most Duration AND 486 skill tier without any sort of sacrifice to macc ==> use a different set (5/5 AF+3, Luminary Sash, 2x Macc earring) and Blurred Harp +1.

Last set will get you best macc, 486 skill tier range but ~19% less duration compared to the previous two setups.
Remember that the mentioned ~19% duration is ~38% duration during NiTro, also remember that during NiTro Macc is virtually non relevant.

Blurred 3:14, daur 3:08 for me, i'm missing the new earring which might give me 1 more radius.