That makes the rule of thumb more like 2/3 vice 1/3…
Yes dear @anav. We have been there before. The MT WLAN drivers with their limited aggregation, is causing higher % airtime as inter-transmission gaps. (same waits but very small/short transmissions) This causes the 1/3 rule of thump for 866Mbps, if a MT device is transmitting in that channel. Larger A-MPDU aggregation gives 2/3 for those.
Don’t want to be based on rules of thump, as the calculation spreadsheet gives accurate numbers, for each case.