How is LA R'yleh overpowered?

[Illuminated One]

Originally Posted by Kuritza

I have seen that trick performed by MA Abyssia. When I have noticed that half my lands have many red candles in them, I've started recruiting priests and preaching my own dominion in my own temples, so domkill failed despite my meager Dominion 6. This is one of the reasons I dont believe in domkills anymore.
But of course, I had many provinces; with a smaller nation, one might notice too late.

The question is can R'lyeh really afford to spam temples (considering it does make you open to raiding you almost need a castle as well, or some guards)? You can of course make Juggernaughts but at their cost a blood nation still outdoes you easily.