The optimization of disordered rock salt cathode materials is a delicate balance between optimising the capacity of the material and the size of the percolating lithium network, while also considering the cycling stability and the synthesis methods. Our results suggest that many-component cation mixing is an additional tool that can be used in the compositional design of disordered rock salt cathode materials, but that the full composition of the material must be considered. High lithium and fluorine content can lead to a large capacity from a large lithium-percolation network (and redox participation from oxygen ) but poor cycling stability and high energy intensive synthesis methods . Many-component cation mixing may be used as a complementary approach to tailoring the short-range order, reducing the need for high lithium and fluorine excesses.