Astrophotography observation planning

I’ve been having some fun using the astroplan library to predict when are the optimal times in the year to observe some deep sky objects. Here is a sky plot for M6 as seen from Auckland, New Zealand.

Sky plot of M6 as seen from Auckland, at local midnight on the first of each month, 2021.

The full sky plot is useful to me as half of my sky is blocked by either buildings or suffers extreme light pollution. The eastern sky is best for me. So this pushes me towards May/June for observations.