Just to swap Eadh for erszebet. Glorg would help as well. Kolos doesnt help, i know its easy wins, but ur wins arent worth as much with him in the deck. You may be able to swap him for Oshitsune or Nistarok. Hope tht helps
I used to run a Nightmare deck with Kolos too but the elo ban on him just kills your points you earn for winning. Hugo is also ruining that so you might want to switch both of them out to put in Glorg and maybe Oshitsune or Nistarok.