US Immigration from Russia

Can my fiancee travel to the US on her K1 visa through (transit) another country, or will she need to fly to US directly from Russia?

So I am currently preparing to file the paperwork for my wife's AOS application.

However, about 2 weeks ago I was converted from working as a contractor (through a recruiter) at my company, to being permanent (direct-hire). I am not worried about the income requirement in the slightest, as my previous salary as a contractor was well above the 125% poverty line. On top of that, my conversion from permanent to direct-hire has resulted in me getting a significant raise. I have been working for my company through the recruiter for more than 18 months full-time.

So the question is: How would I prove that my income is stable? Specifically about the letters from the employers. Would it be a good idea to get a letter from the recruiter, stating my salary and time spent working for them, as well as a letter from my current employer confirming my salary, along with a cover letter explaining that I made the switch from contractor to direct-hire?

Of course, I am attaching my W2's, pay stubs, and form 1040's along with my application as well.

If anybody has any experience switching jobs right before filing for AOS as a sponsor, and input will be greatly appreciated.

Thank you!

Just spent some time browsing timelines for folks in Russia, primarily the IR/CR-1's, but k1's as well.

Seems like there are quite a lot from late 2019/2020 which showed noa2 but didn't get updated anymore, guessing because of the lack of interviews after the Moscow embassy closed? But even still, I would have thought those would have gone to NVC/waiting for consulate assignment?

But even out of the noa1s which don't show noa2 (but I would have thought they would by now), not sure how many are folks who didn't continue and just did something else. Or is there really still a big backlog of folks waiting for NOA2? Because it seems like there's been a couple folks from this year who have had success getting processed.

So here is the situation: We are currently in the process of filing for AOS for my wife, who came in on a K-1 visa.

But are planning to travel this summer. From my research, the EAD takes longer to process than the Travel document.

Therefore, I am thinking of filing for the Travel Document, without filing for the EAD.

My only question is: will this raise any red flags?

My wife's son will be going for his family based immigration interview in Warsaw. Can anyone tell me what fees he will need tp pay to get his visa?

Thank you!