I have an ASUS RT-AC5300 Tri-Band Gigabit Router. Everything works great with sometimes up to 12 devices going at once (when the grandkids are here). The problem is my wife has turned her shed into her sanctuary and cannot get good WIFI connection. The router is in my office and her shed is100 feet away. I bought a small Netgear Extender, that plugs into a socket, but it doesn't help. Any suggestions?