Exporting models and animations from the game for use in Unreal Engine.

Here is an archive Attachment 75694 containing files that can be used to assemble a Banshee with working animation. Everything works according to the same principle as I described; when installing, in Set as Skin Pose and Skin Pose Mode, select all bones, including the GLOBAL bone.
I was slightly mistaken about the plugin – GameZombie doesn't work; you need one from Wonderboy.
Here is a Video – it will probably be clearer this way.

 

Indeed, after repeating all the steps from the video, the Banshee worked in 3ds Max 2020; I didn't notice any problems with the mesh or the animation itself.
There are also no issues with the skeleton size because in 3ds Max 2008, when attempting to import GR2 animations, the mesh starts to stretch significantly. In general, this is a common problem; for some models, the skeleton from the GR2 animation may be larger than the skeleton from Archangel, and for others, it may be smaller, causing the mesh to compress.
Thank you very much for the video with detailed step-by-step instructions!

However, upon importing into UE5, there was an issue where the Banshee's scythe doesn't move in all animations, but that seems to be related to Unreal Engine.

Archangel does not crash on ghosts for me.

Could you share the SMD file from Archangel if it successfully applied the skeleton? I tried again now, and there still isn't a crash, but the skeleton isn't being applied; the bone list is empty.