🔹 Complete missions & tasks(Main, Side, Daily, etc.) with EXP rewards. 🔹 Pair a new Sub-Class with a maxed or higher level Main Class to earn passive EXP on the Sub-Class. 🔹 Defeat enemies and bosses that are at or slightly above your current level. 🔹 Defeat enemies in combat sectors and activate PSE Burst to summon hordes of enemies.