A pack of mines is when there are 16 of them on a 5x5 field. All a Warlock can manage is 8 mines, and Crystal and Phantom spells are like a gamble, depending on how the AT (Attack) stat rolls. Summoning is not combat magic, and you yourself said that the opponent already has Anti-Chaos. It still makes sense to clarify which faction we are playing against.

I agree that 2 schools of magic are good for a Mage, but not for a Warlock. If we have 2 schools of magic, Education and Sorcery, then we will end up with a weak Warlock: only 1 base will remain free, and everything you take in addition to the aforementioned skills will be an incomplete build.