A hot build is this: Kabba-Pard-Zeal, Healer-debuffer build, works wonder on boss fights, and as a secondary healer on Glacia.
An low-investiment build: Pala-Kabba-PD. All you need is some Healing and Barrier Scrolls, you use Healing Factor and Ein Soft on yourself with Restoration to heal and Barrier Arts on, soak the dmg up and have a lot of utility
As for Pala/Ora build, you can switch Diev if you want, cause the majority of healers today are Priest-Kabba-Diev, my main is a Pala-Miko-Oracle cause of this inflation of Dievs xD
1 point in fade, 4(+1) on cure, for pala/oracle you realy dont need much points on Arcane Energy cause you have Restoration atribute that gives SP
1 point in Sanctuary for debuffs imunity, Resist elements is kinda bugged, i prefer Conviction with Arts on, so i can Heal and amplify elemental damage while doing so.
All you need is Cloth Healing arts and some CON and SPR. If you have Barrier arts, you use Dodge and Block from the members inside your barrier. I use SPR/CON/Evasion/Medium Offsseting and Critical Resist on Mace and shield, but you can use whatever you want.