I have looked at the routing on routes I regularly drive and it seems like Magic Earth has a better routing algorithm than Organic Maps. At least it doesn’t try to send me through the middle of a town when there is a route around the town using the highway as Organic Maps often tries to do.
I run a similar setup, but with syncthing as the syncing system. Every time I connect the phone to the charger it just syncs the database and I can even sync it outside the home network. Works like a charm. Worst case you get a sync conflict which is easy to solve.