this looks rather interesting, always liked decks like this. you get yourself stronger while your opponent loses small hp when you gotta do almost nothing for it
.
first of all: do you really need the nightfalls? they give only +1/1 and that's not a big boost, especialy when you don't have a lot of creatures.
so first thing i'd say is remove the 2 nightfalls. then you gotta think what to add instead of them and you have multiple options:
liquid shadow: good if you use it on a strong voodoo doll wich will heal you a lot, removes acceleration.
momentum: nice against stalls, voodoo is hard to kill so cc doesn't matter a lot and you pass shields this way wich is pretty nice.
dusk shield/vampire stilleto: you don't use weapon/shield and those 2 are the best choices if you wanna use them
.
what i did? i chose for momentums cause they give the cheap +1/1 boost just like nightfall but giving voodoo momentum is just really awesome against shield based decks.
i also removed some accelerations, if you wanna use gravity pull on your doll then you shouldn't use acceleration with it and i think 6 is overkill ;P.
i'll show the deck wich i'd advice:
Hover over cards for details, click for permalink
55q 55q 55t 55t 562 562 562 562 562 5ur 5uu 5uu 5uu 5v0 5v0 5v0 5v0 5v0 5v0 606 606 606 606 606 606 606 606 606 606 606 8pl
and then you got it, a deck wich will get very high damage potential with some early game defence throuh gravity pull'd doll or a slower opponent and late game you'll have the high damage potential of accelerations with the healing power of liquid shadow.