Zuko's got enough strength as a firebender to counter the bits that are a danger to her, at least.

And her troops are drilled for exactly this - multiple blasts of fire at once can match even the best firebender's raw power. 

Though they might have trouble matching Iroh's finesse - she keeps the ice away from their troops with flicks of her hand, though she doesn't go on the offensive just yet, instead looking over their opponents with her brow furrowed.

Oh shit oh shit oh shit, what do they do what do they do-

Air blast!

"Avatar!" Zuko shouts, picking herself back up.

Probably they should get on the bisoncat! - Though Amaruq needs to stay on the ice to keep using her waterbending. "Fuck off!"

"Back off, waterbender. I'm not here for you."

"You're the one chasing us!"

"Not you. Her."

"I'm not going to let you bastards kill her too!" 

"That's not what I'm going to do."

"You're fucking Fire Nation! You really expect me to believe Fire Lord Genocidal Dickhead doesn't want the Avatar dead?!"

Okay, enough talking. That never works anyway.

All right nope nope nope that's an angry firebender right there. Not good. Dechen flips over to deflect the fire with a wind shield. "Amaruq, run!"

-Wow, that's actually a nasty burn scar for a firebender. Wonder what happened there.

"You guys get on Appa!" she shouts back, throwing ever larger and more forceful spears and walls of ice at the firebenders - finally overwhelming a handful of the common soldiers. There's massive cracks in the ice spreading from under her feet, too, and the fire is only making those worse - 

- Especially near the firebenders themselves. 

"Watch your footing!" Iroh shouts, as the ice begins to creak. 

No, no- not when she's so close-

"Niece, get back - !" Iroh gestures for the troops to retreat to the ship as she nimbly leaps over to Zuko - grabbing her just as the ice under them starts to break. 

The ice under the waterbender isn't faring much better!

She's got her own agile savior though, no need to worry.

And Appa's more than ready to take off as soon as everyone's aboard! 

Let's get out of here.

Iroh seems to feel the same, at least as far as getting back to the ship and off the crumbling glacier goes. 

She was so close, though.

"It's not worth your life, niece."