A fun spec indeed.

I have been having much fun and luck with this spec: OgCikysMJdBdNuNeJutf1DKfBA

Zealous renewal>Heart of Holy Flame>Pious Assault>Maintain Heart of fury>Victorious sweep when a fill is needed or for a heal.

Its nice having the massive life pool and party wide removing a condition every 4 seconds and being tough against elemental damage isn't too shabby. Not to mention 3 aoe attacks for 89 total and aoe burning for 70 damage. I admit i am rather new to Guild Wars and may be missing something but i solo (with heroes) heroic dungeons with it just fine with zero micro management.

Here is the rest of my core team.
OgNDwcPPP3VtYdreEQIJ1CaB E/Mo protter
Oghiwwh8MOzYTuop0sWQLuYA E/Rit 'Heal'
Oghiwwh8QtzYTuop0sWQLuYA E/Rit 'Heal2'
OAhjYgHqITXTlT2BfCYMNiVVXMA N/Rit Melee support/Dps
Other three i usually run 3 derv heroes with this build but is optional. OgmjYOpMLPSXo74e8KuLv7X5LA

Wouldn't Pious fury see more uptime if you have less foes to hit and also save your adrenaline for chilling victory/twin moon sweep/randiant scythe?

Three healers is overkill; you could lose the 2 E/Rt heroes and give the SoS (which is better as a Rit primary) a Resto spec, freeing up a couple of slots.

You have a lot of HP but your damage is negligible and you have crappy mitigation.

AoM is underrated indeed and I find it fantastic as a pressure relief avatar. But you're wasting unnecessary slots on crappy survival skills like Eternal Aura (which is just plain bad as a PvE skill) and Intimidating Aura, which is even worse.

If you need defensive skills, Mirage Cloak and Armor of Sanctity alone accomplish way more for your party. Why? Large HP pools with low avoidance suck your healer's energy dry.

You shouldn't be worried about spikes because a ST rit will be spamming shelter or you'll be receiving Protective Spirit.

Mirage Cloak alone combined with Armor of Sanctity or Veil of Thorns will pretty much make it impossible for you to die unless you're pigheaded and overaggro and stay fighting instead of retreating.

Also, unlike Intimidating Aura and Eternal Aura, Mirage Cloak, Armor of Sanctity, and Veil of thorns either help your party via aoe weakness, saving your healers energy, and they also apply decent aoe damage.

Victorious Sweep is meh, switch for zealous sweep or Aura of Thorns/Balthazar's Rage. Switch heart of Fury for Pious Fury, triggering more teardown and condition removal.

Put in Save Yourselves as good party support or use Whirlwind attack instead.