Personally, working like that would be far more fatiguing than with the brush head the ‘normal way’
It’s much easier on higher windows to scrub up and down than side to side.
Rinsing wise, I’ve always found 3mm jets and high flow the best. The wider jets create a ‘thicker’ stream of water to flow down the window, whereas as 2mm jets just splash off the glass, meaning less water flowing down the glass.
As for fan jets, tried them all but they don’t rinse as fast as pencils, problem I found was there wasn’t enough weight behind the fan of water to flush down the glass quick enough. They don’t produce enough flow/weight to move dirt down the glass.
They seem to work for others, but not me.