Within HOOMD-Blue, patches can be added to hard particles in order to mimic directional interactions. which has been successfully applied to molecular materials as seen in the investigation of the self assembly of π-conjugated optoelectronic peptides. The benefit of using HOOMD-Blue is the ease in using user-defined potentials as required for the introduction of coarse-grained models. This was demonstrated by Ferguson et al. who tracked the effects of core and side chain interaction strength and sterics on the morphology and kinetics of assembly using a coarse-grained model. These models allow for the formation of design rules by developing an understanding of the interactions and geometric building blocks required for targeted phase behaviour. Here we use HPMC simulations in conjunction with patchy particle models to investigate the effect of the combination of building block geometry and directional interactions on the solid-state phase behaviour of POCs. Due to the simplicity of the model, this procedure drastically reduces computational efforts compared to CSP and facilitates the development of design rules required for targeted phase formation in the future. Through our approach, the degrees of freedom governing molecular crystal formation-geometric shape and intermolecular interactions-are coarse-grained so as to model the phase behavior of POCs. Although a simplistic model, we show that by manipulating the parameters of our coarse-grained model, we can reproduce the phase space spanned by the majority of octahedral POCs present in the Cambridge Structural Database. Finally, our results highlight new phases which are unreported within the literature. While the focus of this paper is on POCs, many of the motifs studied here are seen in other areas of molecular chemistry such as metal-organic cages. Thus our results may have wider reaching applications to predict and rationalise the solid-state behaviour of a range of molecular materials.