Hurrah!
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An update on my playthrough.
It took me basically two nights to reach Lalivero/Babi Lighthouse and get all the Djinn, Golden Sun is not a long game. This is how the Djinn fell on the characters, though I moved Isaac to the end of the party for a little bit so that he could get Luff and become a Conjurer... this actually resulted in a few deaths so I paid my price...
As a Conjurer, Isaac is... well... better than everyone else. Garet and Mia have areas they are better in, but Isaac has them beat in every other aspect.
Ivan, however... stat wise Isaac is simply better than him in every way.
It's interesting how close everyone's stats are with the Djinni they have.
In terms of Psynergy:
I've already gone over Isaac; he has Astral Blast, Mother Gaia, High Impact (boost party Attack), Resist (boost party Resistance), Enfeeble (lower Enemy party resistance), Delude, Sleep, Haunt and Curse.
Garet has Cutting Edge, Mad Blast, Ply Well, Wish Well, Cure Poison, Restore, Avoid and Protect (boost party Defense). It's unfortunate that he has the lowest PP, because he's a really good healer otherwise.
Ivan has Blue Bolt, Mad Growth
(Growth), Cure Well, Revive, Resist and Bind. Basically he's like a fusion between the mono-type Isaac and Ivan
.
Mia has Drench (Douse), Hail Prism, Eruption, Wish Well, Cure Poison and Restore. She only recently got Wish and Eruption, so Garet and Ivan have been doing most of the healing.
Isaac is the only team member without any healing Psynergy; and I've been going through the entire game with only Spritz for multi-target healing. It's crazy how I've only just gotten Wish (and Wish Well along with it) in the
End Game, and two characters got it at once!
This is what the party's Djinn would look like if I gave them the Djinn they had the most of, but kept them in the same class-type as Isaac, none of them gain new Psynergy, but their stats boost to Isaac's level, so I might go with this if I need to.
Garet becomes a Luminier, Ivan becomes a Druid and Mia becomes a Water Monk, they're just the advanced versions of the classes they're already in.