Use cases for
Hoxne Torque: Temper II, Enspells I/II & Enholy, Phalanx (pretty much Phalanx +1 for the neck slot), bigger lullaby radius? Any others?
Horde Lullaby II not so much, imho.
First, +30 might not be enough to get you to the next tier.
The Horde Lullaby II tiers are:
405 (5 yalms), 486 (6), 567 (7), 648 (8)
Even if it doesn't get you a new tier, it might allow for more swaps in other slots to mantain your current tier, right?
Right.
But I think that's not worth it because neck slot is the slot with Moonbow+1. Aside from the macc you get from CHR and Macc, you also lose Song Potency +3 (which for lullaby means 30% duration, or 60% during SV).
Is that worth it?
Imho, nope.
For enhancing magic spell it's a different story. Sadly most spells cap at 500, and for those I guess it's no big deal for jobs with enha skill, so many options to reach 500... I guess it could be good for RUN if you're low on ML to reach capped DT, meva and still get 500 Enha with less slots.
It's a different story for stuff like Temper and Temper II and those (few) enha spells which don't cap at 500.
Also I guess it can be nice, altough very minimal, for jobs going /RDM to improve their Phalanx? Can potentialy get another -1 damage reduction.
Also I guess jobs going mage SJ for Aquaveil? Not all jobs going mage sub can reach 301 enha, required for aquaveil to prevent 2 interruptions.
Likewise a potential new tier for bar spells etc.
All in all this sounds welcome and nice but I don't see a lot of incredibly useful potential.
Very very very nice for Temper II though, 2% more TA is good!