I just beat Naul with 9 people and he wasn't alive long enough to even hear the battle music get started. I think elite marks really need to have their HP raised because at the moment "elite" simply means "odd spawn time", not "more powerful monster." They need to be able to withstand assault from at least 2 full parties for more than 30 seconds if they're going to be an open-world elite NM.

However, I'm still super glad that we have more non-instanced content and I will take this system over FATE and dungeon grinding any day!