Asus wired access points for seamless wireless

[riceowl94]

I have a primary router that is an Asus AC68U with several other Asus routers configured as access points (AC 66U/ AC56U(2)). The wired access points are generally set up to broadcast the same primary networks name and guest network as the primary router. I am generally trying to get relatively seamless coverage across our house (and the ability of devices to migrate to the strongest signal, if possible). Can anyone provide me with suggestions as to optimal settings (compared to the factory settings) in terms of configuring the access points?