Mage feels op only when your enemies are playing it.

Player mages are heavily limited by source skill, build and gears.

Meanwhile, enemy mages are always in the perfect position for a wombo combo (like you start near an oil spot and the mages are half a screen away with a fire spell ready) while also having way more health, armor and magical shield than usual.

This is why the Voidwoken fight is probably the hardest one in the game atm with the cheap chain lightning.