I think with the inclusion of Street Wraith it has to follow an all or nothing sort of thing. I don't see much viability of the card if it's less than a 4 of, because it needs to be seen in the opening grip, or on the draw, to be most effective. If you don't see it in the opening hand, it's really just more Ichorid fodder, and not really living up to it's potential.

Do you think keeping 3 Darkblast in the main was a good idea? I've always liked having the Thug simply for being able to recur Narc's and chump block all day in bad situations.

Are the 4 Wispmare necessary in your meta in addition to the CoV? I didn't see much about your sideboarding other than CoV coming in a few times.

Most of the questions about your build are pretty much entirely based on your meta, so I guess knowing what you've been seeing recently would be helpful in determining if there's any changes needing to be tested.