Build Adv: Where to go from here.

So I've built an assassin, it comes with a love of toxic, carries a crossbow as a gunslinger, and a knife that fills all needs for critical damage. So what now?

I'm considering going up to 120, but not sure what needs to be filled in, suggestions?

You could go this. Since it won't be equipping a Pyro Flame, I ditched the pyromancies. You could also make it Vit/End, lowering Dex to 13 and using an elemental Bandit's Knife.

http://mugenmonkey.com/darksouls/?c=4448882783113827

My only suggestion is get magic barrier it will save you from a bunch of the hard hitting casters.