I have spoken to a few users, but decided mainly on the basis of the data sheet.
Since I like to create deep LRGB shots, a good FW was important to me. At the same time I am limited with the single exposure time because the telescope is the second one on the mount and after some time a drift becomes visible. Thus, I would like to be background limited in a given time, in LRGB and narrow band.
That’s why I chose mode 0 and gain 26 for LRGB, because that’s where the drop in readout noise is. FW is still OK.
For narrowband then gain 56 to be safely background limited. The FW is somewhat worse here than in mode 1, but that was beside the point for me with narrowband - the stars are thrown away in image processing.
Theoretically, mode 1 would be conceivable for narrowband, but the mode cannot be changed in the series. So I’m sticking with mode 0.
All the best,