The number of Imps increases by 16 + 24 + 32 each subsequent week. On the 4th week: 64 + 40 = 104, which is -26 mana. A Warlock with +6 knowledge + 2 from the graduate = 80, multiplied by 1.5 for magic attraction, equals 120 secret knowledge * 1.2 = 144, and multiplied by ~1.0625 for fluctuating mana, equals 153. However, due to the formation of knowledge stats, it will not be +6, but +10-12, resulting in approximately 200 mana, which is realistically achievable. All of this is approximately at level 22-25. That is: Chaos +5 (cold) + 1 (fire) Education +6 Sorcery +6 Native +6 Total: 200 - 26 ~ 174 mana for battle, and this is considering dark magic, which is not insignificant. And of course, much depends on the map. A Dark creature should never be drawn out for too long. Unless, of course, in 3.2 they make Chaos dependent on the number of weeks that have passed since the beginning of the game.