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What do you mean by five weeks? Are you referring to defeating the AI player within five weeks, or completely clearing your territory and collecting all the bonuses? If it's the former, you've misunderstood the point of this map. Playing against the AI here is just a formality. If it's the latter, I'll believe that you managed to acquire the seventh-level creature upgrade (the one behind the dungeon castle) by the fifth week, but how did you defeat the key guardian? He's level 30 and has 200 titans, while by the fifth week, you'll have, at most, 20 seventh-level creatures.
The intrigue of this map lies in the fact that if you develop quickly, you should know that your opponent (a live player, not the AI) might be doing so even faster, which encourages you to conquer all the castles and upgrades to outpace your rival, and in the final battle on the white mountain, have more troops than your opponent.