Colonization

I started the third mission – I held out for almost 4 months without any losses – I accumulated three dozen Archangels, twice as many Paladins, 130 Monks, and 500 Archers. In addition, I'm using 3 Titans that joined me and a hundred Griffins. During the war, I, of course, captured all the creature generators; I made it to the "Enchantment" spell (although it's not really needed – the hero doesn't know dark magic); I obtained the Armor of the Forgotten Hero and the Ice Shield – I destroyed four outposts – only Djinns, Rakshasas, and Titans remain – I can break through them, but not without losses. I tried to break through the Titan outpost and reach the castle, but there's an army waiting for me, 50 times larger than mine, and a level 33 hero, while mine is only level 27 – it's impossible to win.
There's nowhere else to level up the hero – I can only wait for a few months until an army accumulates, so I can destroy the three remaining outposts without losses, or I can spend that time running around and destroying neutrals (maybe someone will want to join – I know diplomacy), and both are boring :(

If I could hire a "saboteur" in the tavern, that would be more fun.