Ok, so I suppose the answer is, "not possible". C5 doesn't support "EasyMesh" and my C6 is a V3 hardware (although only 4 months old). I'm not going to replace all my routers for this minor...

I have an Archer C5 configured in bridge mode, connecting to my fiber modem. From the C5 I run a LAN cable to the Archer C6 which is setup in Access Point mode. For now both are set up in "smart"...