generally same type of encrusting corals co exist, though with monti one might out grow other due to different growth rate (e.g setosa vs mystic sunset) , cant speak about cyphastrea, mine one is in different light zone (low light) altogether, so its fairly far from any sps/monti. Stylo and encrusing monti/cyphastrea should not be a problem, if you glue them with some distance, stylo will grow vertical, branching (mine one grow like that, i can be wrong, if theres encrusting stylo), and once its grown little bit, the shaded zone below them act as natural deterrent to other encrusting coral, so even if you have some below it, they tend to coexist just fine.