One for all and all for one 6

and by destroying his castles

Confirmed. I suggested 2sm4d(3), 8MM6a, and Spider. Alright, enough boasting; his castles were under attack from both sides :D On the 3rd week, I lost all my resources on fairies, contrary to expectations, as there turned out to be 4 of them. Consider it a two-week advantage (at least) for my opponent. For some reason, I decided not to give up and continued playing aggressively until the 6th week, where I was defeated (ran out of mana, money, and cities).
Thanks for the game.