Recommended

Holy healing from level 10 to 90, chosen in the Holy specialization. Target a friend to heal them: Holy Word: Serenity in Chakra: Serenity; Power Word: Shield only when they are about to die; Flash Heal on Surge of Light; Prayer of Mending; Flash Heal when very low; Binding Heal when you are both hurt; in a group with three allies hurt, Circle of Healing, Holy Word: Sanctuary in Chakra: Sanctuary, your tier-6 talent and Prayer of Healing; Renew; Greater Heal when low or at two Serendipity; Heal. Target an enemy to deal damage: Holy Word: Chastise, Power Word: Solace or Holy Fire, Shadow Word: Pain when solo, your tier-6 talent on packs, Smite. An empty chakra is filled for you (Sanctuary in a raid, Serenity in a party, Chastise solo) and never swapped. Reminders: Inner Fire, Fortitude, Guardian Spirit on a dying target, Divine Hymn when five allies are badly hurt, Shadowfiend or Mindbender for mana, Power Infusion, Desperate Prayer. Left to you: whom to heal, placing Holy Word: Sanctuary, Lightwell and Void Shift.

Adapted from Warcraft Tavern: Holy Priest rotation (MoP Classic), Icy Veins: Holy Priest rotation (MoP Classic), Icy Veins: Holy Priest leveling (MoP Classic), Method: Holy Priest guide (MoP Classic), wowtbc.gg: Holy Priest (MoP Classic), Hekili (MoP fork): Holy Priest priority.

In game: /rm set holy chooses it by hand; it loads only for its edition and class, and is listed only for the specializations it is for.