The Storm fist isn't a One Hit Kill. Our shoulder charge, on the other hand, is. We can't self revive, we can't throw grenades like lunatics, we don't get over shields from our super. Sure, the Sunsinger doesn't have any traditional OHK attacks, but, there is no denying that it is undeniably the most powerful PVE class. It's merits carry over to PVP as well. Your argument is sort of odd. The Sunsinger is a PVE class. The Striker is a PVP class. That would be like if I said "Defender is so much harder to use in PVP than the Bladedancer, therefore, Defenders are much more skilled than blade dancers" or vice versa.