Updated the Dark section of the Elemental Team-building Guide as follows:
Decision point 1 for Dark users is the source of class A DEF debuff: SSR Amon (-25%) or Satan (-15%, extra -10% once awakened). SSR Amon provides superior Rage control, while Satan provides overdrive control and can Burst more often. Awakened Satan also has the immensely useful elemental resistance down effect, which decreases debuff resistance. Essentially, Awakened Satan > Dark Amon > Satan. Dark Amon is better in early-game, while Satan is better in late-game once her Awakening becomes available (~August 2018).