You are confusing "power" with "level" Anyone level 20 or higher can use weapons with the same attack POWER as you can. Since Fusion Rifles are a one shot kill weapon, this means that if every shot of it connects with you then you being level 30 is irrelevant. Deej never said that LEVEL matters. There is no damage reduction or bonus simply because of your level and nothing else (like there is with PvE). This is the way it should be by the way, making an event exclusive to just level 30s would be stupid.