Quote Originally Posted by silentwindfr View Post
why the hp don't scale more? because since tons of people will show up, you will end with a monster with 15 billion of hp...
Except that the other games that have done this (WoW, GW2, etc.) have not experienced this problem.

FATEs already have a scaling mechanic where, depending upon the number of people who contributed to the fate the last time, the fate will change next time to accommodate that number of people.

If an A/S rank pops right now, it'll be dead seconds after it's called. Again, scaling HP has worked wonders in other MMOs with rare monsters like this. There's no reason not to use it here as well.