@FlamelordTo add to matt's point, study of the Acianry (xel'rath's faction) is actually surprisingly difficult due to their physical structre causing mild disintegration upon contact with matter as well as most of them being able to eat most forms of communication (radio wave emissions, deep space hailing, etc.) so scanning is pointless...
@thewizardguyFirst off, the avianry actually have a greater rate of disintegration than xel'rath, as a base they're an improvement of xel'rath in most fields with the distinct difference being that they have far lesser control over energy without tools (hence why they actually need 'guns' to fire pewpew beams of doom rather than just spewing them out like xel'rath) however, their main weakness currently is that every single Avianry has a 'cap' on how much energy they can store within them at one time, making it actually viable to simply overload them.
Secondly, before you bitch at the fortress not giving a fuck about your storms and monsters, keep in mind that every brick of said fortress has similar qualities as the avianry themselves however are vastly decreased for the most part in terms of individual use, however, there's ALOT of bricks there and a storm isn't even going to put the energy core over a 1% charge increase. This thing is built to tank sustained fire from WMD's HENCE WHY I'M NOT MAKING ANOTHER ONE.
Part of the reason i gave xel'rath an adversion to expanding was to, frankly, balance him because he can get blantantly overpowered if he was smart and just kind of rolled over the planet the right way.
EDIT: there's also an issue that if i didn't make his faction this potent from the get-go i was worried someone would just nuke it to death. I still don't trust people to not meta game after all the times I've tried doing something sneaky that no one should know about, and then they learn about it ooc, and their characters come to cluster fuck it to death (matt might know what I'm talking about from our experience in other rps)