I want to share mi experience with the forum.
We have linked a remote location with our main node in an non-los path of 5.8Km, obstruction are two trees, one at 30 meters of the end point and the other an about 600 meters.
Equipment are rb411 + xr5 + sectorial panel 90 degree 17dbi in on end and rb411 + xr5 + 29dbi grid in the other end.
channel is @20Mhz 12Mbps fixed data rate working in 5.8Ghz band.
both xr5 are at full power (about 28db)
5Mbps full duplex was reached using nstream, and 2mbps/4mbps without nstream.
Signal is between -71 and -86, with heavy rain closer than -86. In all cases snr are above 20db.
Link is stable, ccq is about 80 up to 100%.
tx and rx ccq and signal are the same.
This link was made in a first time with a nanostation5 with a grid reflector, the link was stable but with some packet loos, less bw and very low ccq on tx (from the nano view).
Hope this information are usefull for anyone.