Added 4 minutes later
Then, I thought of something else. Is it worth leveling up the Catapult? I leveled it up once, and it destroys walls in 1 or 2 hits, but it doesn't really help, because I still don't enter the city. Either the enemy comes out on their own, or I destroy them from a distance. Also, is it worth leveling up "healing" and the ballista? Because the tent and ballista can be easily destroyed during battle. Besides, the tent already heals, so why level it up. The ballista already shoots.