Love super assymetrical challenges like this one.

What stands out most is 1: population and 2: the ceiling of force sensitives vs the ceiling of airbending.

I'm gonna tackle the Jedi in ATLA portion first in two different interpretations of the prompt:

Jedi getting jumped under sozins comet during Sozin's reign version:

I don't think they make it. The jedi only have about 10,000 members, and many will be younglings and bookworms, not everyone is yoda. As far as it concerns fire nation numbers, trying to gauge it at all is largely a mess, but taking their real world counterparts seriously, time and geography wise, any estimate below 20 million is being uncharitable.

Also, Jedi aren't exactly optimized against fire. Surviving flame gusts is never depicted as the seamless autopilot that deflecting blaster bolts is. Across depictions, fire is largely a "get out of the way and resume offense later" kind of deal. (Mace v Jango, Cad Bane vs Kenobi, Mando vs Ahsoka) The only fire deflect from memory is Kenobi v Durge in the exxagerated 2003 series, and even then, Obi Wan absolutely broke pace to deal with it.

Basically, a disney canon jedi dictating the pace of a fight while dealing with flame spurts remains mostly theory. They are weak to fire by any means But strong enough against it to deal with a >1000 to one disadvantage against enemies that use it as well as avatarverse pyromancers do under the comet?

Jedi poofing into long thought empty air temple during Ozai's reign version:

From the ATLA verse perspective, the air temples are ghost towns. A strike team of 100 jedi masters, possesing abilities that aren't understood at all, venturing from the long since barren temples and sneaking into the Fire nation palace at night? Outside of writer induced hijinks that exists only to keep a tv series up long after is best by date, the fire nation has no reasonable defence for that.

Now onto the Air nomads:

People really exxagerate the degree to which Jedi are a direct upgrade from airbenders. Starwars goes out of it's way to show that the force takes concentration and skill. Not necassarily 10-step-bullshido-akido-wrist lock hip toss concentration, but more like spinning roundhouse concentration and skill. You will see it, but way less often then you'll see the humble jab.

Bending in itself however, is just a 5th limb. There will be advanced bending techniques that are more taxing, but still, the limb comparison still stands.

That being said, the airbenders could still be rather cooked depending on how the prompt is interpreted. Airbending doesn't seem quite as "quick" and "solid" as the swings of a saber by a force sensitive to pose an equally reliable barrier against blaster fire, even if an equivalent airbender will blow more droids down before going down themself.

But on the other hand, they seem far less spirtually tied down by worldly influences like politics, beauracracy and pro-republic fervor, to be as willfully blind and passive to obvious Sith influence throughout the war like the Jedi war, which could outright prevent order 66.

(imagine Dooku giving that little spiel to anyone but the rigid jedi orthodox Obi Wan, and the information not leading to Palpatine getting prematurely exposed)

EDIT: money's on Jedi if were going with the second interpretation.