There's also the fact that Time Magick kicks ass in XII, and is by far the most useful to have in a one-on-one fight (since White works better in a group). First, Vaan casts Reflect to neutralize Bolt and Poison, Haste to give himself a speed advantage, Immobilize, Disable and Stop to render Locke helpless, then use Bleed, Break or Countdown to finish him without even drawing his weapon. This battle is a complete joke. Vaan wins, very easily.