I fit a swivel gooseneck to all my brushes.
On windy days on high work I lean the pole into the wind at an angle so if a strong gust of wind comes along by surprise and takes hold of the top of the pole I have an extra second or two to counteract the gust by leaning straight back into the wind with the brush head, lowering my raised arms, then rest it into the recessed window frame if possible unless on protruding bay windows and walk back in towards the building to reduce the wind on the pole until the gust of wind has passed. On gusty days I work in the direction the wind is blowing.
Have to be aware of side gusts of wind funneling between buildings. Once you are above all other surrounding buildings that shelter the wind you'll start to feel it on the top of the pole even though it may not appear windy where you are standing.
Biggest no, no is keeping the pole high and walking around the corner of the building with it because it's hard to keep control of it if it's gusty in the direction you are moving towards.