Ive been doing it this way for a few years now wfp top trad bottom, and i tend to clean all the tops, then go back to where is started and clean bottoms. Than way the windows have stopped dripping by the time you get to each window.
Ive been thinking recently about changing to completely wfp also, and ive decided to stick to what im doing. I mean why double you expenses in resin or buy an expensive RO System, buy tank, pump etc... to save a minute or two on each house. Just my opinion.
Also i definatley agree that custys seem to be happier that i leave the bottom windows dry.