I ran my tail strobe and tail light wires together down the RH side of the tail cone and the wires for my elevator trim servo and magnetometer, which is mounted on the rear deck, down the LH side of the tail cone. I was careful with grounding and it's the first aircraft that I've flown not hear strobe noise in the headset.
DC power wires and strobe wires are OK to run together but try to keep them away from antenna, audio and data cables.
Jim Sharkey
RV-6 Phase 1