Notes from author
Well, this is a remake of an old build I made a while back before the update in which you didn't need a lot of endurance nor Havel's Ring. But, now due to the update which nerfed the Darkwood grain ring no longer could I be the assassin I once was, but you can :P So, in the previous build this had 91 vit and 40 end with darkwood grain ring & the hornet ring. Now you must have havel's ring no matter what :( Anyway, it's recommended to keep the hornet's ring for monstrous riposte damage, but if it is not to your liking, replace it with the Darkwood Grain ring. It saddens me to see the ring was nerfed so badly that it was cut in half but still I love this build and enjoyed roaming in it while still managing to kick-butt and look good. So, do what you will with it.
BUT the main part of the build that you should not change is the weapons, I recommend this weapon combo due to my previously high success rate along with combustion & tempest when cornered. As for Avelyn be sure to use the lightning bolts w/ her if she is lightning +5 because the relation between those two elements increases the damage nicely and could come to be a possible game changer when your opponent is trying to mage you, range you, or just lead you into some of those evil npcs. Overall I've had a lot of fun with this build b4 the update but I'm sure that if you harness it's capabilities it should still be fun as of now :) Good out there in the massive pvp arena of Dark Souls. Catch you all later :)