Which dagger would be best?

And why would this Killic be better? o.0

Only because he can potential it afterwards, with the risk of blowing all of his money into oblivion?

Trust me, after trying to get a decent killic, after having 1 out of 7 60% landing, Using a 90% potential and blowing it up, it is all worth it. I have gone through 3 killics (on my 4th) getting 3 lined and finally getting 8 our of 9 60% landing. Killic clean is almost as good as the other two daggers anyway.