PhaedrusXY: That's true about the ACP and ACF, though he'll also be violating the "flavor" of shugenja =P So a mithril breastplate would probably be a good investment.
For what it's worth, I disagree with Uber's tiers, partially because he assesses them based almost purely on combat viability instead of overall usefulness to a party, and partially because I can't believe he can say with a straight face that the crusader and shugenja are equally useful in a fight. JaronK doesn't list a tier for them, but I'd put shugenja at Tier 5 on his scale, roughly equal to a Healer - even though a healer has better HP, better saves, light armor proficiency, 13 mediocre class abilities compared to the shugenja's single weak ability, and a faster, non-spontaneous spell progression.
As a shugenja, you've got a more versatile spell list than a healer's, but if your role in the party is to cover the healbot role, then a bunch of your spells known are going to go into healing to just barely match what a healer can do automatically. And Healers suck.
I'm assuming you're 5th level from your spell list - so next level you'll learn 1 spell from the Water list and 1 order spell - I'd go for Cure Serious Wounds (since you still don't have any healing spells), and Invis (which is automatic). I was wrong about the divination requirements though - you've got detect poison from the water element and detect magic, so you're fine there.
I'd go for an elven archer shugenja, who's dedicated to protecting the skies and oceans of the elven lands.
[spoiler]
Shugenja 6/Divine Oracle 2/Ruathar 2/Seeker of the Misty Isles 3/Contemplative 7. Stats would focus on Dex/Cha, then Str/Con, then Int/Wis.
Shugenja gets you...well...nothing that a cleric wouldn't do far better, but at least you don't need wisdom. Divine Oracle gives you evasion. Ruathar gives casting progression, some small benefits and a magic item, and survival as a class skill to qualify for Seeker. Seeker of the Misty Isles continues casting, boosts your reflex saves, gives the travel domain, and a ton of useful skills, and then contemplative gives 2 more domains (I'd at least get the war domain for divine power since all the PrCs means that your BAB is shot to hell), slippery mind, and spell resistance.
For spells to pick up, I'd grab haste, dispel magic, dismissal, restoration, greater invisibility, wall of stone, righteous might, heal, greater dispel magic, resurrection, mislead, mass heal, protection from spells, true resurrection, and SNA IX.
That's 2 spells/level listed (or about half of the spells you'd know for each level), mostly from the water element. It gives you some decent buffs and healing, as well as a few battlefield control spells and such - and you'll get more options from your domains and order, of course.
Feats:
1st: Point Blank Shot
3rd: Precise Shot
6th: Skill Focus (Knowledge: Religion)
9th: Rapid Shot
12th: Woodland Archer
Books: Complete Divine, Races of the Wild[/spoiler]