Sorry its taken so long to reply to this but for a mainly healer pc basically a support character
I have two similar builds if you want to try them out. I spec Presence>Thoughness>Agility(Can be willpower or cunning but I will talk about that later).
1. White mage, with AW: Greater Heal, R1: Blessing, R2: Group Heal, E: Any summon you enjoy using or is best for the situation.
Tanky summons = Flame Knight, Wolf(Immune to tease), Phyria
DPS summons = Kiyoko, Flame spirit
Equipment = Core is only really Hero's Helm to further boost your ally's damage.
Team = anyone really but I recommend at least bringing Brint/Brienne cause they do a lot of damage.
Just your standard healer/bard with everything needed to keep your team alive. Uses summons to make great use out of presence and blessing. With this build you can also switch to using magic spells, or lust attacks depending on what you want to spec for your third stat, willpower for spells, cunning or agility for lust. A more mage-oriented support is located below. If you want to switch to lust spells then you just replace your summon with Song of Splendor and one of your recharge spells with Allure and add Bimbo Azzy to your team.
2.White Mage, with AW: Greater Heal, R1: Grease, R2: Fireball or Celestial Smite or blessing, E: Flame Dancer
Equipement = Hero's Helm, and Control wand on main and mage wand in offhand
Team= Kiyoko(Onmyodo) and +1 other tank or healer
Just a tankier black mage, with supportive abilities. Grease is a great spell that gives you time to stall and you can help Kiyoko(non-summon) and Flame Dancer do extra damage. If you plan to use fireball or celestial smite then you might want Control rod and magic wand or any spell power weapon to help you do some damage. Usually want to take c.smite for bosses since it is usually 1 enemy.