It is a good idea if you can limit your SSID to 5GHz only.
Under WLAN -> General -> Radio Policy -> select 802.11a only
Data rates you get depend on AP/Client channel width (20,40,80) support, Spatial stream support (1,2,3) and SGI/LGI (0.4 or 0.8 micro seconds) and MCS (Modulation & Coding Scheme)
http://mcsindex.com/
For client capability, refer below page
https://clients.mikealbano.com/
HTH
Rasika
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