I've just run a test on my AP3935-ROW for max. throughput (=settings that I'll never use in a real deployment) and get 230Mbps with my Surface 5 on the first try.
The settings that impact throughout the most is the channel width (max = 80MHz) and what the clients supports.
As you'd see below my AP is set for channel# 52,56,60,64.
MCS table for reference >
https://en.wikipedia.org/wiki/IEEE_802.11ac#Data_rates_and_speed
My settings....
BTW, I use bridge@EWC only for guest solutions but never for the corporate SSIDs because the controller could be a bottleneck.
-Ron