Cocy priest

Circle of Mortality. When you would normally roll one or more dice to restore hit points with a spell to a creature at 0 hit points, you instead use the highest number possible for each die.

In addition, the Spare the dying cantrip has a range of 30 feet, and you can cast it as a bonus action.

Spellcasting. The priest is a 7th-level spellcaster. Its spellcasting ability is Wisdom (spell save DC 16, +8 to hit with spell attacks). The priest has the following cleric spells prepared:

Cantrips (at will): 

1st level (4 slots):

2nd level (3 slots):

3rd level (3 slots): 

4th level (1 slot): 

Channel Divinity (1/long rest): Censor the blasphomeus. As an action, you present your holy symbol and speak a prayer censuring the undead, fey, fiend and celestial. Each creture of these type that can see or hear you within 30 feet of you must make a Wisdom saving throw. If the creature fails its saving throw, it is turned for 1 minute or until it takes any damage.

A turned creature must spend its turns trying to move as far away from you as it can, and it can’t willingly move to a space within 30 feet of you. It also can’t take reactions. For its action, it can use only the Dash action or try to escape from an effect that prevents it from moving. If there’s nowhere to move, the creature can use the Dodge action.

Destroy the blasphomeus. Turned creatures of level 1/2 or lower are instantly vaporized.

Path to the Grave. As an action the cleric uses one channel divinity and chooses one creature you can see within 30 feet of you, cursing it until the end of your next turn. The next time you or an ally of yours hits the cursed creature with an attack, the creature has vulnerability to all of that attack's damage, and then the curse ends.

Eyes of the grave (5/long rest). As an action the priest can detect any undead within 60ft untill the end of her next turn.

Sentinel of death’s door (5/long rest). As a reaction the priest can transform any critical hit into a normal hit within 30ft of her.