With all due respect (to you and your many interesting builds) I think I would set up the Trees differently as I see the build as being a support role, a cc and non-aggro damage dealer:
I'd also go 18/1/1 with Bard/Rogue/Clr or FvS
Heroic: Spellsinger (40 AP) all the way for Mass Hold Monsters, the spell DCs and all the nice adds. At least 16 AP into Feydark for +2 CHA, CHA to hit, YGMB and +3 Spell Pen. I would dump TA. 4 AP into War Priest/Soul. 18 AP min. into SB for first 3 cores, doublestrike Action Boost, movement speed and deflect arrows etc. The rest is up to you. You'll get a lot of your melee damage from Epics. I'd even go as far to suggest to go Chaotic Neutral and I think I'd try and fit in Arcane Insight somehow.
I used 65 ED points as per your build... I swapped Machro for Draconic as I like Coalescence a LOT combined with Harmonic Resonance and I'd be using Horn of Thunder SLA and Greater Shout on CD. Pianissimo and Cover of Darkness provide -65% Threat from all sources which I think is what Bards need. And to top it all an enlarged Mass Hold Monsters
Fatesinger (38)
Core 1
Tier 1 (4) - Epic Strike, Harmonic Resonance,
Core 2
Tier 2 (7) - Pianissimo III, Mantle, Discord
Core 3
Tier 3 (9) - Rhythm to Reign III, Magic of Music III (Evocation), Masquerade III
Core 4
Tier 4 (7) - Majesty, Arcane Resonance, Very Very Vocal, Enlarge
Tier 5 (7) - all of them
Shadowdancer (17)
Core 1
Tier 1 (6) - cover of darkness III, Technician III,
Core 2
Tier 2 (3) - Lithe III
Core 3
Tier 3 (5) - Shadowstriker, Enchantment DCs III
DI (10)
Core 1
Tier 1 (5) - Perception II, Dragonhide III
Core 2
Tier 2 (3) - Coalescence III
Anyway thats my 5 cents, and did me some good taking a break from reading the Servers are Down doom page.
Thanks for the ideas!