I run a media bridge between two ASUS AC68U which are 3m apart. The primary one is now running Shibby's 119, the bridge one is running asuswrt-merlin (for the time being). For the bridge I only use 5Ghz.
Before switching to Tomato/Shibby, I saw link rates between 860 and 1300. Now the highest rate I see is 400 something. In overview the channel width is shown at 40Mhz (instead of 80).
Settings 5Ghz: Access Point/Mode: Auto/Channel:Auto/Bandwidth:80Mhz/Control Band: Lower/WPA2 Personal/AES
Advanced Settings: Everything on default but /Wireless Multicast Forwarding:on/Country:EU/
Any hints appreciated.