Especially if they are persons you don't often see in waking life, more power to you. Make sure to RC as mindfully as possible everytime you see them, and of course the more of those practical ones (more occurrences in dreams, less in waking life) the better of you are. But you don't have to rely solely or majorly in dream signs I think, no big deal. RC's if properly done and implemented will appear with or without the signs which are mostly only a boost.