For me the speedrun timer work well, but request no skill to use it except learn the game, is true that it's the only counter for this foe. Hope developer will check comments.
I hope so too. I as a player shouldn't have to set up an external timer to defeat a monster or monsters. And the nightmare mode being more luck based than skill based is the biggest issue for me. I like the pets, I think those additions are fine, but that monster is now too op as it can randomly kill you at any point. I don't know why the timer works for you, I tried using a timer and the monster sometimes comes after 2 minutes after it left or before 2 minutes and I can't really deal with that. I hope for a better update, but right now it seems like normal difficulty will be more fun and better.