I currently use an RT-AC68u router in my one-story home, about 1900 square feet. The router works fine, even with the metal studs in the walls, except in the extreme ranges of the house and backyard. I'm in no rush, but I am thinking of upgrading the router to something that would broadcast a stronger signal. Would an RT-AC86u broadcast a stronger signal? If an 86u broadcasts a stronger signal, I might use that by itself. I could also make the 86u my main router and use the 68u as an aimesh node. Would the 86u be considered an "upgrade" from the 68u?