Originally Posted by
Zumi
What you are asking for already exists in FFXI the newest endgame areas Escha. There are 3 tiers of NMs which require crafted items, and key items from other NMs to pop. The huge problem with this type of content is that its open world certain lottery nms are required for pop items of forced pop nms and requires a huge amount of people 18 people with very high level gear to do anything. Requires almost the full group to have relic level weapons, along with certain support jobs, no bard with out relic horn and empy harp you aren't getting anything done.