I know that the WoL is far, far from invincible, but we have one hell of a resume. I played through the MSQ, expecting to find some reason as to how this man could be so powerful... but whatever was shown to us, it felt rather limp. I'm not denying that there were reasons to support Ran'jit's strength, but to me, it felt he still needed to be supported with some degree of mental gymnastics in order to make it work.
It just felt like he was stronger than us because the story required him to be stronger than us. In short, plot armor.