Well, I finished reading through BoEM 2, and have decided that there are many spells I question.
The call of the gem series... okay, their effects aren't necessarily devatating, but the very concept that they get no save bothers me. And it could be the equivalent of a no save death spell if you (frex) make a character attack the king.
Extend charge - neat idea, very useful. But for a 3rd level spell letting you use your favorite staff multiple times (which can have far higher than 3rd level spells) without expending charges is a little too generous. I'd lower the duration or limit the total spell levels provided by this spell, or both.
Robe of reflection seems a level or two too low... compared to elemental protection spells of a similar level, it is a little powerful.