Tip: How to automatically tend your Royal Crew positions

Good question!  This is a common issue because players who don't have a lot of neighbors tend to end up with people on more than 5 Royal Building Crews.  You're already being a good neighbor just by visiting and tending any of those Royal Crew positions.  Rest assured that most players would be happy to have their neighbors do what you're already doing.

So which buildings are really the best to tend?  For you as the visiting neighbor, it doesn't really make a difference.  There are no special "Alliance" buildings.  Anything you tend  in a friend's kingdom, building or otherwise, gives the exact same Alliance points.  The only thing that ever changes your Alliance point earning rate is if the neighbor is throwing a party.

From the perspective of the friend you're visiting, it might or might not matter very much.  The best way to tell what anybody really wants tended is to ask!  Your clicks on their Royal buildings help them to level up those buildings for higher Castle points, until they're maxed out at level 10.  Your friend can tell you which, if any, of their Royals are at level 10 and no longer really need tending.  And your friend can tell you if they're less concerned with Castle points than with something else, for example if they'd rather have you accelerate some crops or crafting buildings, etc.  In general, though, you're being a great neighbor just by visiting and tending any of those Royal crew positions.  Stick with your best guess and keep up what you're doing, or ask your friend a question by message or by chat.

The icon on the left means that you have an Alliance with that neighbor.