What is a safe level you can turn tx-power/all-rates-fixed up to. Thanks,

default

you should not turn-up anything. this is for lowering, or leaving at default.

usually default setting is maximal available power, so, ig you rise it up you can and you may damage your wireless card eventually. use tx power settings only to lower power if your signal levels are too high - -50 down to -60 dB is ok signal.

I have set it on 18dbm for some time. It's working OK so far.