OK, here's the concept.
PFS-legal, preferably (though this is a thought experiment so I don't mind hearing about non-PFS variants). Thus, 20-point buy.
Oracle with the Wood mystery.
Select a race that allows this favored class bonus for oracles: "Add +1/2 to the oracle's level for the purpose of determining the effects of one revelation." So elf, aasimar, ifrit. If Aasimar, probably Azata blooded (we want a DEX bonus and the +Cha is also nice), or possibly Garuda-Blooded.
I'm starting with elf for simplicity's sake. This grants proficiency in Longbow which is a nice bonus and works with Wood Bond.
Use the favored class bonus towards either the Wood Bond mystery or the Wood Armor mystery.
Wood Oracles get Shillelagh at 2nd level as a bonus spell. Use this spell to enhance a quarterstaff - it is one of the few weapon buffs that enhances both ends of a weapon - as long as it is a quarterstaff. TWF becomes pretty decent at this level. However Shillelagh only works on non-magical weapons so after a certain point it becomes less useful.
If using your favored class bonus on Wood Bond your bonus to hit with wooden weapons would be:
1st level: +1
4th level: +2
7th level: +3
10th level: +4
14th level: +5
This is not a huge improvement over the regular ability, but as a non Full BAB class the Oracle can use all the help it can get. Also if you are an elf you get proficiency with longbows too.
If using your favored class bonus on Wood Armor your armor bonus from the wooden armor would be:
1st level: +4
5th level: +6
8th level: +8
9th level: add DR 5/slashing
10th level: +10
13th level: +12
This only gets impressive when combined with magic vestment, so you probably wouldn't use this until 6th level or later. But having no armor check penalty is nice. Between barkskin and shield of faith I'm not sure how necessary this would be.
You could also go with sword & board if you have the feats... though I'm not sure you do. An oracle is proficient with a shield as armor, but not as a weapon. Maybe an opalescent white pyramid?
Problems with the build:
1. Even though you are using TWF you still have STR to damage and to-hit. A quarterstaff or a club are both one-handed instead of light weapons.
2. You rely on a lot of buffs to function, which can cut into action economy.
3. A very MAD build.
4. Many of the spells that would thematically work with this mystery are druid spells and are not on your list.
As elf: STR 14, DEX 16, CON 12, INT 10 WIS 12 CHA 14
Traits: Seeker, Fate's Favored
1. Extra Revelation (Wood Armor)
Mystery: Wood Bond
3. Two-Weapon Fighting
5. Divine Protection
9. Quicken Spell
11. Improved two-weapon Fighting
Spells (not counting orisons):
1: Shield of Faith, Divine Favor, (cure light wounds)
4: Bull's Strength, (cure moderate wounds, barkskin)
5: Summon Monster 1, Cat's Grace
6: Magic Vestment, (cure serious wounds, minor creation)
7: Dispel Magic, silence, protection from evil
8: Blessing of fervor, (cure critical wounds, thorn body)
9: Forceful strike, prayer, burst of radiance
10: Righteous might, (mass cure light wounds, tree stride)
11: Breath of life, freedom of movement, ?
This is how things look without gear, but assuming all relevant buffs are up:
1st level with buffs: equipped with morningstar and light wooden shield and scale mail
AC: 10 + 5 armor + 3 DEX + 1 shield + 2 shield of faith = 21
To hit (melee): +0 BAB + 1 wood bond + 2 STR + 2 divine favor = +5
Saves: F:+2, R:+3, W:+3
3rd level: equipped with quarterstaff and breastplate
AC: 10 + 6 armor + 3 DEX + 2 shield of faith = 21
To hit (melee TWF): +2 BAB + 1 wood bond + 2 STR + 2 divine favor + 1 shillelagh -2 TWF = +6 (or +7 with bless)
Damage: 2d6+5, 2d6+4
Saves: F:+3, R:+4, W:+4
5th level: equipped with quarterstaff and breastplate
AC: 10 + 6 armor + 3 DEX + 2 shield of faith + 3 barkskin = 24
To hit (melee TWF): +3 BAB + 2 wood bond + 4 STR + 2 divine favor + 1 shillelagh -2 TWF = +10 (or +11 with bless)
Damage: 2d6+7, 2d6+5
Saves: F:+5, R:+6, W:+7
7th level: equipped with quarterstaff and wood armor +1
AC: 10 + 7 armor + 5 DEX + 3 shield of faith + 4 barkskin = 29
To hit (melee TWF): +5 BAB + 2 wood bond + 4 STR + 3 divine favor + 1 shillelagh -2 TWF = +13 (or +14 with bless)
Damage: 2d6+8, 2d6+6
Saves: F:+6, R:+7, W:+8
9th level: equipped with quarterstaff and wood armor +2
AC: 10 + 8 armor + 5 DEX + 3 shield of faith + 5 barkskin = 31
To hit (melee TWF): +6 BAB + 3 wood bond + 4 STR + 4 divine favor + 1 shillelagh -2 TWF = +15 (or +16 with bless)
Damage: 2d6+9, 2d6+9, 2d6+9, 2d6+7, 2d6+7
Saves: F:+7, R:+8, W:+9
OK, how does this build stack up?
What gear should this character be getting?
Any other thoughts?