Ok my samsung tv was causing my router to reboot while playing a movie from the usb of the router, so I put it on the 2.4GHz and played a movie with no problems.
So I did some digging and found out my samsung TV only has n not ac, and did more digging on info and found for us to change under the 5GHz section under wireless, then basic settings
"Wireless Network Mode" to AC/N-Mixed and Extension Channel to upper upper
I just did and now I am seeing my air 2 hit 650M WOW this setting seems well worth it since I only saw 300M before on the default.
I added this to my 1st page post. Try it out for yourselves and let me know.
I will post back on samsung TV movie playback after the movie ends in 2-3 hours.
I need to test more but it played fine.
Edit my iPhone 6+ now gets 433M
to see this just log into the router, this is that page that shows up first or "status" then "SYS Info"
Edit 2: I moved the air with me near the router and I get 867M !!!! I think this may be top ?