Use this build to Heal allies fast with little down-time

Sanctum of Faith
Moonlight
Regenerate 5% Moonlight every 1s while not using Moonlight.
Level 5

Restored Faith
Moonlight
Heal for 30 every time you Heal an ally with Moonlight.
Level 3

Swift Arrows
Moonlight
Increase allies' Movement Speed by 18% while they are being Healed by Moonlight.
Level 3

Protectors
Guardian Spirit
Regenerate 6% Moonlight every 1s while within 30 units of Luna and not using Moonlight.
Level 3

Feral Strength
Guardian Spirit
Increase Luna's Health by 225.
Level 1

Goddess' Blessing
Moonlight
Allies being Healed by Moonlight take 15% reduced damage.
Level 1

Master Riding
Armor
Increase your Mount Speed by 30%.
Level 2

Nimble
Armor
Gain 14% Movement Speed.
Level 2

Haven
Armor
Reduce the Damage you take from Direct and Area of Effect attacks by 12%.
Level 2

Guardian
Armor
Increase the effectiveness of Shields you create by 20%. This does not affect most cards and passives.
Level 2
These are best for they either benefit from the speed boost (Ruam, Terminus,Vivian and Ash), the damage reduction (Inara and Ash) or the pocket healing (Andro and Evie)
These Supports can stack their buffs with yours. This can create an absolute stomp with one of the offensive paired champions
Stay in the range of your Guardian Spirit and supporting tanks while in a comfortable position the help flankers