cold eye spawn rates

Cursed Sanctuary 2 can hold its own, it doesn't involve as much jumping and the spawn on the bottom platform is massive. Since the 4 other mobs are Tauromacis with a spawn time of ~1 minute. It just respawns Cold Eyes faster.

Definitely that or Sleepy Dungeon 3 is the best for most though, I've seen people use Path that Lost Light (before the Sanctuary maps) but I think it suits certain types of mobbing better.