I live in Arizona and dry feet have never been a problem. Only wet, like in the winter when it's muddy and I can't keep their pens clean.
I don't use hoof conditioners at all.
What I do use, if their frogs are yucky and getting thrushy is Durasole. I love Durasole for thrush and I have occasionally used it for sole hardening as well. Actually, I bought it for sole hardening but now it is my favorite treatment for thrushy frogs.
Other than that, I never get into hoof topicals. Just never saw the need.