Optimum setup for Multiple Wifi APs dual band

Installing and Using OpenWrt Network and Wireless Configuration
1

I'm sorry if this is a general question but i'm trying to make sure my Wifi setup is of the best It can be - currently its default.

My hardware
1x Linksys WRT3200ACM
3x Archer C7 v2 - I have a 4th but haven't bothered setting it up yet
Gigabit CAT6e wired backbone

They are all on the same SSID for 2.4ghz and 5ghz

For the 2.4g I use
Operating mode N
Channels 1 6 and 11 (I use channel 6 twice)
Width 20mhz
Transmit power on all is 20dBm

For 5g I use
Operating mode AC
Channels 36 / 44 / 52 / 60
Width: 40mhz

Is there anything I can do to make the network any better?

my transfer speed on 5g is 116mbit avg
my 2.4 g speed is 66.5mbit avg

Id like to try and get better speeds and makesure my network remains seemless

Anyone got any tips?

2

Not much you can do through config to improve link rates once you've reduced the number of SSIDs per AP in use ("beacon pollution"), eliminated the legacy and slower rates, and reasonably prevented same-channel interference. You could remove some of the slower base rates, but that might mean that weak-signal stations wouldn't be able to connect at all.

On your 5 GHz setup, at least in the US, channels 52-144 may be impacted by DFS. If DFS kicks in (and it is illegal to disable it in the US and many other jurisdictions), the AP might shift to a non-DFS channel, causing same-channel interference. You might try configuring 80-MHz wide on only 36 and 149, depending on the separation of the APs. With lower range on 5 GHz, there might not be significant AP-AP interference. You could also try 40 MHz channels on 36, 44, 149, and 157 (assuming you are in the US). There's a good illustration of the 802.11ac bands at http://www.revolutionwifi.net/revolutionwifi/2013/03/80211ac-channel-planning.html

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