I don't know what to tell you about this other than it just being completely false. At least in any reasonable context. You can be full Berserker Elementalist and you're still going to swat mobs like flies when you're level 80 and downscaled to 15 or whatever.
One can't help but think that maybe you're trying to play the game too much like WoW if you're dying to 2-3 regular mobs at at time.