Mormesk dodges the rays and casts Greater Hedged Imprisonment.
A skeletal judge appears from the negative plane sitting at a regal wooden desk engraved with macabre scenes of skeleton warriors and angels caught in epic battle. The spectator is restrained by spectral chains that glint in the cave lights that line the walls. The judge seems to be looking over dark ethereal paperwork and points a long boney finger at the Spectator. Though he says nothing audible, it's clear a conversation is occurring between them on another plane.
The judge pounds a ornate ebony gavel and both the judge and the Spectator are instantly teleported out of the material plane. Yulya can instantly tell that the barrier the Spectator has been maintaining is down. This means too that Nezzner has a chance to escape.

Alice watches with awe
Whoa, so cool!

You get a communication from Mormesk, "I presume you can handle this situation, I shall return soon to collect my payment as we previously agreed." He disappears without a trace.

Certainly Mr. Mormesk, I don't like unfinished business!
Though Alice is disappointed by Mormesk's disappearance, she's also glad she's not forced to fight the spectator - or even Mormesk himself.

Nezzner is taken down on the third attempt and as Alice holds him he says in frustration, "This is outrageous!" His struggles are moot.

The only outrageous thing is that you are still alive! But fret not, we shall correct this insolence immediately!
Alice focuses on keeping Nezzner restrained. She again spends 1 Ki point on Flurry of blows and attempts to shove him prone as a bonus action. If that works, Alice attempts to strike the staff out of Nezzner's hand. If she has one more attack left, Alice switches to her Shortsword and tries to cut off Nezzner's last ring.

You are left with the flaming skulls, the Bulette, and Nezzner who could still be a challenge.

Alice glaces South to the flaming skull
Nice skull!
I still wanna be your friend! And that Spectator's. So pls don't fireball me!