The KS scene can be exported to FBX, including all the cameras. It will work to match the exact perspective or angle, as long as the cameras do not have any animation applied. KS cannot export camera animation, so be aware of that.
If you need to match the camera movement in both applications, you would need to animate the camera in Blender and then import it through Alembic to KS. Don't use FBX for this workflow - FBX is buggy and you'll have some weird jumps between keyframes.
To export the scene cameras you need at least one simple cube or plane to be visible in the scene.
I don't know a better way to get the job done quicker. If you look into the VFX industry - all smoke sims are done seprately and composed into the scene in post afterward.
Hevy geometry + smoke sims in one scene = billions and billions of samples to be noisefree
Both rendered seperately is more simple to handle and to denoise.