For the first week, I focused on building up my forces (3 home castles + a hidden den of giants, which also included nagas in the fortress).
On day 121, I established a strong position, but by the end of the game, I had amassed a maximum number of units.
On day 122, I captured the "treasury" castle from the red player, and I had 196 troops, 8 mages, 2 golems, 4 nagas, 10 giants, and a few fairies. The red player, in turn, took Pandora on day 123 with 30 magogs and surrendered.
Thanks for the game.