I am registered migration agent. I agree that the teacher pathway is very convaluted at the moment with many states stipulating migration with job offers before they will consider an invitation. While on the face of things the skilled visa looks cheaper, there is still a skills assessment, registration with the state board, proof of English and experience and the $3600 cost for the visa. Comparatively the partner visa is $6865 now in Immi fees but does not rely on the subjective nature of all these other third party entitities that take 3 months or more at each stage and at significant costs. The partner visa is purely based on your relationship with no proof of English or skills required. Certainly an easier more solid option that skilled migration for teachers at the present time.