Water Seer class series

The Water Seer class series is the default class series available to the Mercury Adept Mia. Mia is a member of this class series if she has either only Mercury Djinn set to her or no Djinn whatsoever. This class series is unique to Mia; the other Mercury Adept, Piers, is a warrior rather than a healer and receives his own default class, the Mariner class series.

The class series, when at its highest stage of Angel and compared to the other series at their highest respective stages, features good PP, but lower Defense, below average HP (tied with both Oracle variations and the Necromage and higher only than the Sorcerer), low Attack (tied with the Wizard and Necromage and higher only than the Sorcerer), and very low Agility (tied with the Beast Lord and higher only than the Hero). This series' luck rating is tied with the Dragoon class series and the White Mage class series as having the highest luck rating a class series can give. Noteworthy Psynergy from an endgame perspective includes Pure Wish, Pure Ply, Cure Poison, and Break, and the heaviest area-of-effect Psynergy it has is Ice Missile. Average stats from an endgame perspective are 142% (144% if you don't factor in Luck).

Analysis
Mia's Mono-elemental class is the resident healer of the group. The Wish series will get the job done and is invaluable for boss fights, while the Ply series is useful to patch up one Adept who desperately needs it. The biggest issues, however, are a debilitating agility stat, meaning Mia will quite often be taking her turn last (or close to last), which may or may not be beneficial depending on how you look it, and the lack of a revive skill and a bare bones offensive Psynergy lineup which when coupled with the sub-par attack rating makes using her in regular fights (post The Lost Age reunion) a rather unappealing prospect.

Keeping Mia (and everyone else for that matter) in her Mono-elemental class will get the job done without much fanfare. However, switching her to either a White Mage or Hermit will sacrifice her Ply series at the gain of some Agility, more PP, and a much stronger offensive Psynergy lineup.