it's a nice idea but i don't like the idea of a weather pattern having a constant bleed effect on your hp.

seems overly complex. There's really only 3 high level NM's in Eureka atm - Pazuzu is easy because people actually need it but most don't even want to bother spawning Amarok or Lamatsu most of the time. I don't think most of the playerbase would go for it imo.