I'd be interested in your pointing out which aspects of my articles on The Case for Chimpanzee Religion and A Trans-species Definition of Religion you believe are reductionistic. 

I totally agree that work in the philosophy of religion will progress by being cross-disciplinary. 

My work has been in dialogue with religions scholars, primatologists, anthropologists, neuroscientists, linguists, archaeologists, paleoanthropologists and mathematicians working on symmetry systems and octonian theory in physics and society.  I am also a practicing psychotherapist trained in Jungian oriented therapy.

If I have not included biological theory per se that is because it is not a discipline in which I have any training or expertise, professional or self-taught. So I welcome suggestions from that discipline.  I have recently read Ervin Laszlo's book on Connectivity.  He argues that there is a hierarchical series of templates from physics, biology, mind, and cosmos.  The mathematical formulas are beyond me, but the general notion of levels of integration seem plausible.