It's pretty common for a team of powerhouses to feel weird when they receive a competent support. Especially if it's a support mage when they have an attack mage. She will need to understand the difference between the two of them, since the only similarity the two of them have is their main class (mage). The new guy is a scholar, a natural support. She is an elementalist, a natural attacker. Being overwhelmed by the variety of abilities shown from the guy makes sense for her, with the severe lack of mages that they have