Seventh Sister vs Sirak

Who wins?

Sirak

Sirak.

Seventh Sister ragdolls.

That Sirak was a top apprentice of the academy amounts to squat here.

Seventh Sister is a far more powerful Force user.

The Seventh Sister is a demonstrably superior combatant.

I'd say Sirak via lightning.

Seventh Sister solidly, far more powerful and more skilled.