Ok, you DON'T need an Obliterator, you need home brewed stuff, stick in some Skinrenders for creature removole and add more Altar's Reap for your draw. Find some space for Undying Evil to keep stuff coming plus it's nice to shoot onto a Skinrender for another -3/-3 to kill a titan... So here's my suggestion: -2 Skirsdag High Priest, -1 Tragic Slip, -1 Dismember, -2 Moan of the Unhallowed, -2 Swamp's = +2 Altar's Reap, +3 Undying Evil, +1 Cemetery Reaper, +2 Ghoulcaller's Chant... Try this out on paper, it might work.

Add a Mikaeus, the Unhallowed for undying across your board. Makes Killing Wave that much better

That is actually pretty damn awesome...hadn't thought of that! I'll try and get hold of one or two, although I'm not sure what to swap out for them?

-1 dismember, -1 mortarpod, +2 Mikaeus, the Unhallowed