Hey All,
The siege bosses are broken and have no limits. You can pull one from out of the storm to anywhere on the map and use it as a wrecking ball on all player pve server bases. It should be limited to just the storm, like other enemies. I pulled one a full grid square out of the storm to see how far they can go. Some folks from halfway around the world are using them on our server to literally wipe the map and build everywhere.