Here's an algorithm for building structures: Day 1 - Town Hall, Day 2 - Harpy Nest (upgrade the building immediately - this is your most powerful unit for the first 2 months), then combine armies and give Gunnar only the upgraded harpies, and give all other heroes the troglodytes and cyclops, Day 3 - Mage Guild level 1, Day 4 - Blacksmith, Day 5 - Market, Day 6 - Citadel, Day 7 - Castle, Week 2, Day 1 - Magister's Hall, Day 2 - Capitol - all economic issues are resolved.