RT-N66U + RT-AC1900

[red fuji]

I have the Asus AC1900P and the Asus N66U and i would really like to 'mesh' them together or at least get them to work togther for best wi fi performance possible. my connection plan as follows : Modem connects to RT-AC1900P , AC1900P connects to RT-N66 via Ethernet. i plan on using both the LAN/wifi features on both routers . how do i set this up ? what do i connect first, second, etc. and what router(s) settings need to be made? i am a layman on this subject so any steps or concepts to help me put this togeter is greatly appreciated.

 

[RMerlin]

Configure the AC1900. Then, plug the RT-N66U, and configure it in Access Point (AP) mode.