? how to make smallest royalty trigger radius!

Hi everyone,

I have been experimenting with a design to have the King and Queen pace the smallest circle for defense. So far i notice they will go closer or farther away from their 9 tile pad depending or what type of structures are near. Without anything near they pace two tiles away from the pad edges and one tile diagonal. If anyone reading has some more info to help understanding process and would like to add it much appreciated for a war base I'm trying to design. I'd didn't search forum much but this isn't a topic I've seen discussed from what I've read here. Sometimes when attacking i notice if i don't trigger royals asap when attack starts i have to wait for the next opportunity to get the attention and I'd like to find how to use that time loss for defense tactics. I change designs maybe too much but i notice over time most 3 stars can be prevented by a few second delay.

Thanks in advance, Cheers!