What do you think of my cleric subclass?

I made this cultist like cleric subclass and I’m not quite sure if it’s balanced.

here it is.

Parasite Domain (cleric)
“It is not blasphemy, it is a greater calling.

Level 3: Deeds and lies
You will control there feeble minds.
You gain proficiency in persuasion, deception, and intimidation if you did not already. Also, up to your Wis modifier per long rest you may gain advantage on any Cha checks you make for the next 1 minute whenever you cast a cleric spell of level 1 or higher.

Level 3: Parasite domain spells
Power shall be yours.
Select one of the following Warlock patrons: Archfey, Celestial, Fiend, or Great Old One. The Patron Spells of your chosen Patron are Cleric spells for you. When you reach a Cleric level equal to a Warlock Level listed on the Patron Spells table for the Patron you have chosen, you thereafter always have the listed spells prepared.

Level 3: Blasphemous doubt
Your words will cut through the minds of all.
As a magic action you may present your holy symbol and expend a use of channel divinity to call upon unsightly truths and lies that target a creature of your choice. The creature you chose must make a Chr saving throw (Dc 8 plus your Wis modifier), on a failed save the creature take damage equal to the roll of a number of D6s equal to your cleric level, on a successful save the creature only takes half damage.

Level 6: Blood sacrifice
I will grant you aid.
Whenever a creature with a CR of 1/4th or more is killed by you or your allies you may grant one of the following benefits to yourself or one of your allies within 30ft of yourself as a reaction.

Profane vitality
The target of this feature gains temporary hit points equal to 4 times the CR rating of the creature that was killed.

Arcane transfer
If the creature killed had the ability to cast a levelled spell the target of this ability may regain an expended spell slot of a level of spell the creature killed could cast.

Ability can be used twice per short or long rest.

Level 17: Unholy ascension
I will show you your true self.
You gain the following benefits.

Tempered will 
You have advantage on Cha, Int, and Wis saves.

Skin of the heretic.
You gain immunity to one damage type of your choice.

I based the domain spells on the ua vestige patron warlock’s extra spell list thing.

My thoughts:

Deeds and Lies - I'd suggest you change this from gaining proficiency to adding your Wisdom modifier to those checks. This would let players who really want to build for it to be able to add their Proficiency Bonus,Wisdom, and Charisma to one or all of these checks.

Parasite Domain - Interesting. Celestial patron feels a bit off-brand for this subclass, but it's fine.

Blasphemous Doubt - DC should be 8+Wisdom+Proficiency Bonus, instead of just 8+Wisdom.

Blood Sacrifice - Tying Profane Vitality to CR feels a little swingy and a bit meta-gamy, but Arcane Transfer is pretty cool. You might want to reword the spell slot regained to allow you to regain a spell slot up to the spell level the creature could cast. That way if the creature could cast a level 5 spell and a level 7 spell, you could choose to regain your spent 6th level slot.

Unholy Ascension: Pretty strong. Might like to see a way to change the damage immunity when you finish a Long Rest.

Got it, thanks. 

working on a version 2

here’s my updated version using your and other people’s opinions.

Parasite Domain (Cleric) V2
“It is not blasphemy, it is a greater calling.

Level 3: Deeds and lies
You will control there feeble minds.
You gain proficiency in persuasion, deception, and intimidation if you did not already. Also, up to your Wis modifier per long rest you may gain advantage on any Cha checks you make for the next 1 minute whenever you cast a cleric spell of level 1 or higher.

Level 3: Parasite domain spells
Power shall be yours.
The power of your deity ensures you always have certain spells ready.
Select one Warlock patron besides Vestige. The Patron Spells of your chosen Patron are Cleric spells for you. When you reach a Cleric level equal to a Warlock Level listed on the Patron Spells table for the Patron you have chosen, you thereafter always have the listed spells prepared.

Level 3: Blasphemous doubt
Your words will cut through the minds of all.
As a magic action you may present your holy symbol and expend a use of channel divinity to call upon unsightly truths and lies that target a creature of your choice. The creature you chose must make a Chr saving throw (Dc 8 plus your Wis modifier), on a failed save the creature take damage equal to the roll of a number of D6s equal to double your proficiency bonus, on a successful save the creature only takes half damage.

Level 6: Blood sacrifice
I will grant you aid.
Whenever a creature with a CR of 1/4th or more is killed by you or your allies you may grant one of the following benefits to yourself or one of your allies within 30ft of yourself as a reaction.

Profane vitality
The target of this feature gains temporary hit points equal to 4 times the CR rating of the creature that was killed.

Arcane transfer
If the creature killed had the ability to cast a levelled spell the target of this ability may regain an expended spell slot of a level of spell the creature killed could cast or lower.

This ability can be used twice per short or long rest.

Level 17: Unholy ascension
I will show you your true self.
You gain the following benefits.

Tempered will
You have advantage on Cha, Int, and Wis saves.

Skin of the heretic.
You gain immunity to one damage type of your choice besides Bludgeoning, piercing, slashing, or force. You may change the chosen damage immunity upon finishing a long rest.

Any changes I’ve made are underlined.