Sharing this setup here, used to be farming S10 bosses with this toon, basicly to chain CH on the tank i used.
Mainly a support healer, with max HP/max nano setup.
http://auno.org/ao/equip.php?saveid=201666
Max HP with behe and Doc HP buffs: around 13k
Max Nano available: around 11k
Feel free to add sugestions,
Cheers.