Well, I have two gear sets for the situations I'm in, but even then I have a few pieces I swap in depending on what I cast. In Light Arts I use the AF legs and I use the Errant body, AF head, Errant Hands, Penitent's Rope, Prism Cape, (Goliard if I had it, but I use Rostrum atm), Tamas ring + (Omega Ring if I had it, but I use Ether), Loquacious, Phantom Tathlum, Enhancing Torque, and the Antivenom Earring. If I am casting stoneskin I throw in my Enhancing Torque and my Kirin's Pole w/ the Bugard Strap +1 as well as if I am castin En-ga's or Phalanx-ga.
When I use Dark Arts my gear is roughly the same with a Diamond instead of Ether, atm the Mohba Scarf +1, again the Bugard Strap +1, my Aquilo's Staff, AF body, Mahatma Slops, Phantom + Novio, and the Elemental Torque. This makes my spells hit more often as well as improves my Helix spells. I'd probably use the Ice Grip for Blizz III and IV, but for helix's I'd have to test that or Bugard's to see the diff.
I honestly can't remember what the guy's name is, but there is a taru who has a great guide online for SCH and he shows some solo macroes that I incorporated that have helped immensely in my soloign capabilities. The most notable is the gear-swapping---> Ability macro. It basically uses the techinique of swapping gear to not be Ability-Locked while using your stratagems so you can kite and get ready to shoot of any spell with much more effeciency. I found the site.
http://kanican.livejournal.com/tag/scholar%21
Hope this helps. ^^