I think I can help. I've a viable amount of statistical experience under my belt when it comes to roleplays. If you'd like to see an example of one such RP under construction, check out
The Dark Star, a fantasy rp designed by my brother and I. We're implementing a lot in the ways of mechanical stats, dice rolls, and algorithms. It's not perfectly play ready yet, but refer to my first post on the OOC thread (the 2nd post on the thread) to see the kind of work I'm capable of.
Of course, I would build a new system from the ground up in order to accommodate how complex you want it to be, and what features you want it to have.