Been spending a lot of time on here!
When you take the film from the roll do you hang it up straight away ? i was taught to take an end in each hand and pull hands apart about 7 times and it shakes most of the water off
I never used to agitate on photoflo, just pretty much dip and remove. There really isn't any need, provided that your solution is pre-mixed. It's just there to lower the surface tension so that there is no visible residue left behind.
I squeegee my film because I almost always get water spots if I don't, but I accept that there could be scratches. I usually don't get any though, possibly because I rinse my squeegee blades with hot water and clean the blades with my finger each time I use it... *shrug