Only on the second week I went to the secondary town, collected three Griffin Conservatories there 2+3+1 and entered the treasure zone on day 131. There was a bit of XP and stats, a quest artifact for 20 Medusa Queens, and that's it. At home, I built the Mage Guild and got Town Portal. I was planning to rebuild the fifth level, but it wasn't needed — Air magic was delivered in a box behind Arch Devils in the second treasure zone. By the end of the week, I collected a couple more Hives there, a Golden Bow, Air and Earth spell boosters, and a Speed Cloak.
On the fourth week, I flew to the Library through a no-road portal (scouted on the first week), keeping in mind that the opponent is maneuvering there. On his turn, he moves the army into the treasure zone under Septienna, who is standing at the Library. I figure everything is somewhere nearby; Clavius is visible in the Tavern, but there's no Air View spell (Air magic is basic), nothing for scouting, so I have to advance blindly, but I still managed to find the enemy heroes.
Thanks for the game!