Darth Zannah vs. DE Sidious

Can Zannah break his mind?

Zannah's Sorcery makes him lose control of his Wormholes.

What if Palpatine engages her in a duel?

She spins Bane's Heart into an impenetrable defense and charges up her Sorcery while courting the battle.

Sidious slaughters her.

Sidious eats Kursid warriors' hearts with Plagueis, Zannah uses Bane's heart as a crystal in her lightsaber. She slaughters.