My current brush set up-
Xline mono flocked for everyday use.
Great all rounder and lasts and lasts
Gardiner's sill flocked for fascias/gutters.
The long bristles get under the gutter line and in between the brackets easily, plus lightweight which is a must for fascia cleaning.
Xline flocked sill for con roofs.
Slightly heavy but great when using ladder and attacking a roof from above. The weight means you don't need to apply much pressure and the bristles are tightly packed which gives excellent scrubbing power.