Do you have to fight every ZNM to move to the next tier? Or can you get to Pandemonium by just doing Hydra, for example? Or if you do need all three Tier IV, do you need every single ZNM under them to get there?
Since we no one has been there, everything is speculation...but I would imagine you need all three T4 pop items, seems to make sense alla all four god seals for Kirin, not just 4 Genbus. You should not need all ZNMs done either imo as the T1 and T2 mobs for each path are interchangeable with respect to T3 mob options; although, it could be something along the lines of Captain rank where while it took 25 points to achieve the rank ups prior to Captain, all assaults had to be finished for the final rank (along with ToAU missions).