We have developed a simple quantum dynamical model of resonance energy transfer driven by emergent resonances, known as scattering mediated absorption resonances, in composite nanoparticles. Importantly, we have shown that such composite nanoparticles can be used as versatile RET donors, owing to the fact that the energy, intensity, and lifetime of the SMA resonances may be controlled by simple geometric parameters of the composites. Applying our quantum dynamical model demonstrated superior RET efficiency may be possible using these composites as compared to plasmonic nanoparticles of similar size. We also proposed assemblies of composite nanoparticles and plasmonic nanoparticles that leverages well-developed DNA-based nanotechnology for creating super-assemblies of nanoparticles with well-controlled spacing and orientation, and showed that such assemblies may be used to realize strong coupling between the CNPs and plasmonic particles. Our results sug- gest that these composite nanostructures, and assemblies involving them, may have important implications for light harvesting, energy transfer, and the control of chemical reactions through the paradigm of polaritonic chemistry.