I have just used my pole and just switched out brush heads. I prefer using an Xtreme brush with fan jets so you get a decent spray, and it’s a lightweight brush, so not too bad on the shoulders. Great for f/S/g cleans and application.
I suppose you could use a separate brush and pole hose (you could just run it on the outside up to your brush head) so it’s totally separate and not too much faff??