Another issue:
The AI reacts when you start building the towers, but doesn't react when you start the spell of making.
So, I after taking the AI city with the towers, another AI (With a stronger power rating than me) declares war. I manage to barely destroy two stacks he sends my way, then he suggests a cease fire (outside of the diplo screen).
I accept the cease fire and start researching book of mastery. I complete the tech, rush build the last tower and start the spell of making, but the AI, doesn't even attempt to attack me.
One minor issue: (More of an irritation really)
When I was attacking the AI with the towers (The one in my OP), he kept on saying "You've earned my respect, let's stop the war". I refuse, and the next turn he asks me again, I refuse, then he ask me again the next turn, and again, and again, each and every turn until I finally defeated him.
Honestly, I think twice is enough.