Problem is, if youre secure enough to be buying cards during a time like this, youre not stuck as many of us are
The words each, any, all, chosen, or name do not work without the word target. Sculpted Sunburst does not target either creatures or opponents
One of this decks weaknesses is that it is so heavily built around Yawgmoth that Counterspells can be quite effective
when it is, its more often as a rider on an already powerful spell like Mirror Entity, Mutavault, or Crib Swap, not because its essential to keep a tribe together
Theres another possible fail state with the deck where you can draw Charnel Trolls and no enablers, or else miss your enablers, but you should usually be able to cast a different three-drop in those spots and cast Charnel Troll later in the game after your opponent has killed some of your creatures
There are enough of these types of cards that you could lean more heavily toward one than the other if you wanted, but I prefer to diversify just in case