Majority of the locations are either 4 man or 8 man parties. Which ends up making things a little more manageable. The first 24 man alliance is going to be introduced in 2.1. Majority of the end game content is 8 man parties. It's not seen in here, but the Binding Coil of Bahamut is the current ultimate dungeon for people to test themselves against. And the final floor remains undefeated.