Positive you're looking for the Blending series that starts with Convergence by Sharon Green. Though it's possible you read the second series that's a sequel to the events of the first set (with same group of characters as the first series, including Tamrissa) that starts with Intrigues
Though it's possible you read the second series that's a sequel to the events of the first set (with same group of characters as the first series, including Tamrissa) that starts with Intrigues