Wireless bridge connect EA-N66 to base station RT-AC66U
I'm using an old Dell Latitude E5400 laptop with this spec:
Setup as follows:
Dell Latitude E5400 <--LAN--> EA-N66 <~~Wireless Bridge~~> RT-AC66U
The Pyramid "meet" the AC Knight at 1Gbps speed 
LANTest speed result
Excellent speed, damn "geng" 劲啊 (powerful) !! 
!!
Bear in mind, the EA-N66 is on Ralink and the RT-AC66U is on Broadcom
ASUS must have done an excellent job in making this 2 chips to "talk" with impressive speed !!
Again, 劲啊 