If it is a router it will work fine. You can either run both the other routers as routers or AP and set the SSID,passwords and radio channels in whatever is most effective for you. I would recommend you run the 2 secondary "routers" as AP just to make things simpler. You will get easier communication between devices if they are on the same IP network and port mapping will be simpler. It will work perfectly fine though if you want to run them as full routers. AP/Router decision has no impact of how you setup your radios in the device that part is the same.