Wireless clients packet loss & high latency

Hi mikrotik expert,I am using mikrotik sector 120 mantbox, Ther are only 10-12 clients connected with good signals still high latency with the packet loss of all clients together. Plz see the screenshots and help me.
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Use nv2 or nstreme

You Clients have Bad Signals, everything under -65 is real bad

ubnt clients also connected to the same AP, so using 802.11.

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bad idea

in nstreme, latency continuously high aprox 50-80ms when pinging to ap.
with nv2 same result as 802.11.

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-65 isn’t that great, in many clients scenario weakest clients slow everyone down.
Also check the SNR, not just absolute signal level (and the noise floor). There might be some interference on the channel causing errors and client disconnects…

then what is the recommended signals, and what to do to resolve the same ?

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