Getting permissions right with systemd mount unit

The permissions work flawlessly, when mounting with gvfs, via nemo-share and manjaro-settings-samba as discribed under Using Samba in your File Manager

However I’m getting transfer speed from and to a smb share of roughly 1.7 MB/s.This issue is know and has been discussed multiple times for example here:

Trying to circumvent the problem, I was planning to switch to cifs (solution from first link), since installing gvfs-git and gvfs-smb-git (solution from second link) is not working anymore, since gvfs-git is newer then required by gvfs-smb-git.

Any ideas?

It really sucks, that the same drive mounted under Windows is around 10x faster than my current linux approach.