I have some other variations of my Darkmagic set for Dreadspikes(a little more HP+, and fastcast/haste), and Absorb-TP(a little more fastcast/haste).
But, here's my current Dark magic set: Mostly for Drain, Drain2, aspir, aspir2, and stun.
I have a Dark earring too, but ffxiah is not letting me put it in there for some reason... it lists some other earring.
Swift belt switches to Anrin Obi when appropriate, with spellcast. The Nuevo Coselete has Fastcast+5%, and magic accuracy+4.
Still missing merciful cape/Abyss cape, and just need a few more campaign rank ups and I'll be able to get crimson belt, and sturm's report.
Campaign just bores me... I used to hate it before all the updates they did to it, though now I've been doing it more because I need some of those AN items/gear. If I'm using my Naglering I still get a 6hit build with pole grip by using: /sam, brutal, rajas, an augmented Attila's earring + ecphoria ring for TP, and have to WS in attila's earring...which allows me to have the +23STP for TP and +22STP for WS, for the 6hit with Naglering. I will get the rose strap(cause it makes it easier) though...working on getting the rank.
And while we're posting "magic sets"... I'll also post my DRK's current enfeebling magic set: For bind, sleep, and sleep 2.
Demagogue's Sash switches to Anrin Obi when appropriate, with spellcast.
Again, missing Abyss cape here. Also missing sturm's report for the reason stated earlier.
Possible upgrades I still need to get: W-head(crimson mask), Enfeebling torque, and Helenus's Earring + Cassandra's Earring.
I also start casting my spells in Nuevo coselete and my other FastCast gear, and finish casting with skill and magic accuracy (and INT too, if it's enfeebling magic), with Spellcast. I also have max dark magic merits, and max enfeebling magic merits.
Edit: And yes, the Job ability: Nether Void... increases your Drain/Drain2 by ~50%.