Are these Chaos Mage abilities balanced for a tabletop RPG villain?

[SeekerOfTruth007]

I've thought of a few:

Cripple (x1)

Sets the victim's HP to 1 unless they make a Strength check (Roll 6 or higher.)

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Weaken (x2)

Halves the victim's HP, rounded up. (3 becomes 2, 4 becomes 2, 5 becomes 3, etc.)

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Fear Wave (x1)

All opponents in sight radius lose their turn each round until they make an Intelligence Check (Roll 6 or higher). They get a free roll immediately, then one roll per round until they get free or until they die.

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Fire Orb (x4)

Deals D4+1 damage to a single target. That target can't regenerate this turn. Dexterity Check for Half damage.

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Frozen Orb (x2)

Deals D4 damage to a single target. That target loses its next turn. Dexterity Check for Half damage.

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Lightning Bolt (x2)

Deals D4 damage to all targets in a straight line. Dexterity Check for Half damage.

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Fire Storm (x1)

Deals D4 damage to all enemies in Sight Radius. Dexterity Check for Half damage.

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Death Spell (x1)

Slays all summons in sight radius. The get no Save.

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Haste (x1)

For the next 5 turns, you get 2 actions per turn.

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Drain Life (x1)

Deals D4 damage to a single foe. You gain that much life. There is no Save.

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Quick (x1)

Take two additional free turns after this turn.

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The Chaos Mage is controlled by the Game Master. He/she will already be stronger than player characters, so players must work together to defeat him/her.

What do you think of these abilities?

For reference, Fighter has 12HP, Rogue has 8HP, Cleric has 8HP, and Mage and Summoner each have just 6HP.

[AI Opinion]

These powers feel like a raid boss in a small dungeon 😅

With PCs at 6–12 HP, Cripple to 1 HP on a simple 6+ STR check is brutal, especially combined with Fire Storm, Lightning Bolt, or Fear Wave locking turns. Fear Wave until-success with full skip is harsh; I’d cap its duration. Quick plus Haste gives way too many actions.

I’d lower Cripple to “reduce to half HP,” limit Fear Wave to a few rounds, and restrict action‑doubling so fights stay tense, not hopeless.

[SeekerOfTruth007]

The Cleric has healing powers, and there are Potions in the game, although Potions are weak and expensive in this game intentionally.

These are the abilities of the Final Boss. Weaker "Chaos Mages" will only have a few of these spells, but the Final Boss is designed to require teamwork and items to beat.

[SeekerOfTruth007]

Here is the final boss' stats versus the Fighter's stats.

Chaos Mage (Final Boss)
Armor: 7
Attack: D12 +1 to Hit and Damage. Adjacent Only. D8 +1 to Hit and Damage, Ranged.
Strength: D12
Dexterity: D12
Intelligence: D12
HP: 16
Move: 2+D6

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Fighter
Armor: 5
Attack: D12, Longsword, Adjacent Only.
Strength: D12
Dexterity: D10
Intelligence: D8
HP: 12
Move: 2+D6

Abilities:
Spin Cut (x3): Attacks all adjacent enemies.
Cleave (x3): Attacks with D20 and does double damage to a single target if hits.

[Anonymous]

Nope