I dunno lady in wight and wightprince have pretty powerful effects. you think konami would be able to add them without another CA situation?
Honestly, if you're going to use King of the Skull Servants as the main boss, use Gozuki to mill out the Servants. Also Creature Seizure seems gross if you want the Servants to be in the Graveyard ASAP. Order to Smash or Order to Charge could be a better use for it.