Lightning bolt/healing wave

/run if UnitCanAttack("player","target") == 1 then CastSpellByName("lightning bolt") else CastSpellByName("healing wave") end

Purge/Healing wave(Rank 4)

/run if UnitCanAttack("player","target") == 1 then CastSpellByName("Purge") else CastSpellByName("Healing Wave(Rank 4)") end

Elemental Mastery, Chain Lightning/Chain Heal

/run if UnitCanAttack("player","target") == 1 then CastSpellByName("Elemental Mastery")CastSpellByName("Chain Lightning")else CastSpellByName("Chain Heal") end

Nature’s Swiftness, Lightning bolt/Healing Wave

/run CastSpellByName("Nature's Swiftness") if UnitCanAttack("player","target") == 1 then CastSpellByName("lightning bolt") else CastSpellByName("healing wave")end