I enjoy playing HORSE, but I'm not so into to play all the time. But, any advise to improve my play is always welcome.

Is it more useful to mastering HORSE to play and try to improve your weak games in HORSE indivdually or to continue to improve your play in just by playing HORSE games/tourneys. For example, if I have need to improve limit stud 8b, do I concentrate on playing ring games of stud 8b?

If I should be playing ring games at what stakes?