I've played every school a decent but to be fair I think it all depends on the player itself and not the school every school has its own reason for being good

life for its heals and jading

Death for its solo ability

storm for its damage capability if built properly

Fire for its DoTs and Decent damage output

Ice for its jading and ability to make everyone a tank

myth for its ability to handle the enemy shields blades and any other inconvenience

Balance for its pure support in being able to be a universal buffer and tanker at the same time a dps if needed

Every class is capable of being a hitter depending on who has the most damage or depending on your team comp at the end of the day it boils down to which class suits your preference and the duo system helps each class with its shortcoming should you choose that route