There are probably a billion different methods of crosswind/heavy wind landings, but I think it all depends on the manufacturers suggestions coupled with common sense.
Some people will perform heavy crosswind landins at flaps 28 instead of flaps 40, but then the normal visual cues differ so much that any advantage of using a lower flap setting is 'eaten up' with relearning how a flaps 28 landing is supposed to look.
But a consistent method that I've used at my two previous employers is adding half of the steady-state headwind component, and all of the gust factor.
Personally, I leave out the slip until I'm about 200 feet AGL, but I've seen some other guys set it up at 1000 feet and keep it in until touchdown.