Soul Twisting Rit> Warder.
Seconded.
You don't need a monk hero that's healer's boon. Ever. Why? Because Healer's Boon sucks. It's even more so on a hero that doesn't know how to manage energy.
UA on a hero is fantastic, since they can pop UA instantly. Divine healing, heaven's delight are useful and even if they "miss" with it then it's only the equivalent of 7 energy rather than 15. And you don't need to run high attributes in crappy healing prayers, whose sole reason for existing is dwayna's kiss and gift of health. You can slot 8 or 9 Gift of Health +10prot for SoA and Aegis and be done with it, with d-kiss in areas with heavy hexes.
The alternative is Healing burst, which doesn't require them to use it properly since they use it as a spot heal. Slap Healing Burst +d-kiss+ energy management, spot removals that you micro. With an imba in the team things will be pinging your team for about 10 damage so the Healing Burst pressure heal every 4 seconds will be much more useful than a once-every-30-seconds Heal Party (or 12 without Glyph).
I can't recommend Word of Healing in a team with an Imba. It is likely you will never be spiked that hard and if it is a spike it will be armor ignoring so it won't be something Healing Burst+Spirit Light+ Protective was Kaolai can't handle.
How I would do it:
1 Imbagon with Spiritway
1-1 ST rit with Union, shelter, displacement+ armor unfeeling+one offensive spirit microed (Disenchantment is a good choice for your setup) or N/Mo with Protective Spirit + aegis+SoA and minion elite of choice (Jagged Bones or Aura of the Lich)
1-2 SoS rit with Splinter Weapon, Painful Bond, Bloodsong, Spirit Siphon, Protective was Kaolai, Spirit Light + Mend Body and Soul
1-3 N/Rt Healer with Spirit Light and Mend Body and Soul, Protective was Kaolai + Curses stuff like Shadow of Fear, barbs, weaken armor, and enfeebling blood
2 Dervish
2-1 N/Mo Strength of honor with Foul feast or Mo/any Smiter's Boon cleaner with Strength of Honor and Heaven's Delight
2-2 Me/any Panic damage mitigation + enchant removal , Keystone or illusion mesmer in physical heavy areas
2-3 D/N orders or Mo/any with Healing Burst or UA
Panic+ST and Imba are enough to do DoA hard mode so it should be handling every area. I didn't have an Imba and I still steamrolled. Since you are duoing I'd assume it's everything not in Tyria basically (up to Crystal desert is 6 man).
2 physicals carrying the most importance means you need a "cleaner" like a Smiter's Boon monk or N/Mo.
Anything not killing things (or augmenting your ability to do so) is a waste of a slot when you are steamrolling. That means monks.
EDIT: If you mean you run
http://www.gwpvx.com/Build:Team_-_Hero_Spiritway
Then I'd have to say I find SoGM to be rather slow on heroes since they can't manage the energy (15 or 25 with only 5 reduction is steep). The only things I run for VQ are ST (every 15 seconds is faster than every 30) and SoS (every 30 seconds). I find SoS is slower than ST because you need to wait for the darn thing to recharge. If it didn't have such fantastic bar compression I'd skip it on a hero.
In general for damage:
You have a few options, a Necro, Mesmer, Monk smiter, Ritualist. Rangers would be viable but you have a Dervish so you have AoE already.
)
