We have a sloping and relatively short runway, but I still use the same method as all the other clubs and schools I've been at for nearly 40 years. 20 deg for normal or crosswind, 30 deg for short/soft. I only advocate 10 deg for certain types of take off, not landing, because it's mostly extra lift without much extra drag. I see no reason to change but I'm still ready to learn if there's a compelling case for something different!