Everyone in this thread completely missed an important line and some important facts.

#1
If you ever hope to defeat The Dzemael Darkhold dungeon boss, you will need to clearly assign roles amongst your specialized party of 8 rank 50 players.
Specialized party? This sounds like a hint towards new job system to me. If 1.18 housed new job system + dungeons this would be a massive step forward.

Rather than being advanced versions of classes, we would like players to think of jobs as specialized playing styles optimized for partying. While playing as a particular job will render you unable to equip certain actions of other classes, you will be compensated with access to exclusive actions, which can be acquired through quests.
#2
Are four players required to enter rank 25+ raids? And 8 for 45+?
Currently, yes. Rank 25+ raids will require four players to enter, and rank 45+ raids will require a full party of 8. This is a result of the balancing that is done inside of the actual raid, along with ensuring proper load on the servers are maintained. With the release of patch 1.18 we will monitor the comments and feedback from the community and re-evaluate as necessary and implement variations as needed.
You cannot "solo" a dungeon. Unless you bring in 3 or 7 other people to AFK and let you do the work then it wont happen. Or if you multi-box multiple Characters. Either way I doubt we will be seeing it done for a very long time.



Hope this brightens people's outlook on 1.18 a little bit more.