So I'm hanging out on my lvl 12 Knight dropping summon signs at gargoyles to help some people out. I'm in human form but not thinking too much of it for whatever reason. Then I suddenly get invaded! Phantoms name is <something>marbles I can't recall. Anyways it seems to start okay, he won't start fighting until we bow, etc. He is dressed in robes and seems to have a strange fist weapon.
Anyway we start fighting, and I land a few blows with my +5 longsword. Now, I'm far removed from any sort of skilled Dark Souls player, but at SL 12 a +5 longsword is pretty good, it certainly decimates PvE foes with ease. My strong attack connects and lands for a whopping 34 damage, which looks like approximately 5% of his health bar. How is this possible? Shouldn't he be +/- 10% of my level so maybe SL 14? And then I noticed he has joined the darkwraiths since he starts trying to steal humanity.
Anyways, we have a somewhat reasonable fight, though can you not parry fist weapons? After seeing my normal attack wasn't going to worry him too much I started trying to parry/riposte and I'm certain I should have landed some parries, but it just never happened
So I start backpeddaling up the stairs where that wooden plank bridge is (I was invaded near the bridge to the smith). He follows me up, and I'm almost out of Estus I think he's toying with me now. I can't seem to hurt him, nor parry him, while each time he hits me it's taking almost 1/3 of my life. He tries to hit me again, I roll and spin around, now suddenly I have him near the edge. I give him a kick which since he appears to be in cloth with no poise, pushes him back ALMOST far enough, he tries to move to get out of the way of a second one, but he is too close to the edge and falls to his doom.
So I guess I "won" but I don't understand how I could barely scratch him, nor parry him!