Bringing together the observations made in this study, we are able to suggest some guidelines for de-signing compositionally complex disordered rock salt cathode materials. Our simulations support that substituting many transition metals on the cation sublattice is a route to suppressing short-range order in lithium transition metal oxides, but diminishing returns are observed for short-range order suppression as the number of transition metals in the simulation is increased. This is likely due to extensive transition metal substitution not being able to fully counteract electrostatic and elastic interactions between the transition metals and the lithium which drive short-range order formation in disordered rock salt cathodes. This suggests that most of the benefit of short-range order suppression observed in many component systems should be observed in more "moderate entropy" disordered rock salts.