Any alternatives to this Reach / AC Specialized Bard Build?

[Iterman]

So Here's the Build:

Level Advancement: Lore Warden 1, Archivist 2-6, Lore Warden 7, Archivist 8-20
Half Elf
Traits: Magical Knack??,Metamagic Master?? (Don't like Defensive Strategist)

Weapon: Bill (+1 shield bonus to AC when fighting defensively)
Armor: Chain Shirt

Favored Class Bonus: Add one spell known from the bard spell list. This spell must be at least one level below the highest spell level the bard can cast.

Feats
1: Skill Focus (Survival[Half Elf trait]), Power Attack (Bonus Feat), Extend Spell
3: Lingering Performance
5: Eldritch Heritage (Touch of Rage - Orc Bloodline)
7: Shield of Swings (Bonus Feat), Combat Expertise (Lore Warden), Echoing Spell
9: Quicken Spell
11: Discordant Voice
13: Improved Eldritch Heritage (Fearless)
15: Spell Perfection (??Summon Monster V or Shadowbard??)
17: Greater Eldritch Heritage (Power of Giants)
19: Improved Eldritch Heritage (Strength of Beast)
(Sadly, no Arcane Strike since Strength of the Beast trumps it in regards to most things; not a huge fan of Spellsong or Harmonic Spell unless someone has a few ideas I haven't thought of)

Spell List
Cantrips: Detect Magic, Ghost Sound, Mending, Message, Prestidigitation, Read Magic

1st: Comprehend Languages, Cure Light Wounds, Ear-Piercing Scream, Feather Fall, Grease, Moment of Greatness, Saving Finale, Touch of Gracelessness, Vanish/Silent Image

2nd: Blistering Invective, Cacophonous Call/Haunting Mists, Glitterdust, Invisibility, Mirror Image, Misdirection, Sound Burst, Tongues, Versatile Weapon

3rd: Arcane Concordance, Confusion, Dispel Magic, Reviving Finale/Displacement, Exquisite Accompaniment, Good Hope, Haste, Slow, Summon Monster III

4th: Dance of a Hundred Cuts, Dominate Person, Greater Invisibility, Sonic Thrust, Summon Monster IV, Virtuoso Performance/Shadow Conjuration, Wall of Sound

5th: Bard’s Escape, Cloak of Dreams, Greater Dispel Magic, Ki Shout, Shadowbard, Shadow Evocation, Summon Monster V

6th: Euphoric Tranquility, Hymn of Peace, Project Image, Summon Monster VI

Masterpieces:
The Dance of 23 Steps (Dance)
Symphony of the Elysian Heart (Keyboard, Wind)
Possibilities: The Canticle of Joy (Sing) & The Quickening Pulse (Percussion, Wind)
(Caveat: Paizo products only[no D&D or third party products], Our group uses the Standard method to determine ability scores)

Any Recommendations for Traits besides skill ones? What would be a good spell for spell perfection besides the ones already listed? Any better metamagic spells (and their uses with spells)?And as a mechanical question, can you turn on fighting defensively with an Attack of Opportunity?

[Dennis Deadsky]

Where is Combat Reflexes? That ought to be among your first feats ...

[Iterman]

I'd have to get rid of shield of swings for it and since more than half the time I won't be expecting to hit anything I'd say the +4 ac it adds is better than a few more AoO.

[Fourshadow]

One of my favorite masterpieces is Vindictive Soliloquy from Magical Marketplace. Sure, it takes 5 rounds to go off, but then you have 5d10 Thunderbolts to unleash every round--not lightning, but Thunder (sonic damage!). Very cool.
It works like call lightning spell, but sonic rather than electricity.

[Cap. Darling]

What AC are you Aiming at? Without combat reflexes i suggest you drop the reach weapon and get a non reach one.
I also Think you have a too Big focus on spellcasting since you only ever Will have CL 14.
I simply dont undestand what role the character plan to fill in combat.
Edit: armor expert trait Will allow you to use a Mithral breastplate without spending a feet on profisiency.
Edit 2 i see you get only 2 lore Warden levels i am confused it seems. Sorry.
Summon monster on the bard list is not really worth it IMOP. If you only take 2 levels in lore Warden i Think there must be better classes for that dip.