I think that, as this deck is right now, the soul catchers aren't worth it. Because at the moment you activate the Desiccation, you want to have played all death cards already. Because you don't want to play anything of death after the enemy creatures die. So i would take them out, or make this deck a mono death deck with plague and ivory dragons (and some more soul catchers). But as it is now, you would be better of with two more pendulums (or a pendulum and maybe a graveyard (but this way you would need to be careful to not let the enemys whole field be spammed with cells, because if that would happen, the skelets would spam your field, not leaving a space for the arctic dragons. (Wouldn't be much of a problem if the opponent is dead anyway after that turn.)