Aion 2 party and raid sizes: 5, 10, and 20 explained

The current numbers

Content	Players
Party dungeons	5
First raid (Sanctuary)	10
Force (four parties)	20

If you are reading a party composition guide, a class tier list framed around group slots, or a raid comp recommendation built on 4-player dungeons and an 8-player raid, it is out of date.

What actually changed, and when

This is worth getting right, because a lot of English coverage has framed it as a global-only adaptation. It was not.

The 4 to 5 and 8 to 10 changes shipped to the Korean service in the Chapter 1 update on 1 July 2026. A Force is four parties, so it moved from 16 to 20 at the same time. NCSOFT then confirmed the same numbers for the global release in an August developer stream, which is where most English reporting picked it up.

The practical consequence is the same either way, but the reason matters: global is not getting a special build. Global is launching on the current Korean build. So Korean guides and community knowledge published after July 2026 are directly applicable to you, and anything published before it is describing superseded numbers.

That is more useful than the "global is different" framing, because it means the Korean community's ten months of accumulated experience is largely transferable rather than something to discount.

Also confirmed for global: auto-loot pets, gear-balanced adjustments in PvP, and the Brawler class absent at global launch.

Why 5 and 10 change composition thinking

Going from 4 to 5 is proportionally large. A four-player group is typically tank, healer, and two damage dealers, which leaves no room for a specialist. The fifth slot is the first genuinely discretionary seat, and it is where a group can afford utility, a second healer for harder content, or someone still learning the fight.

Ten is the number that changes how a legion organises. Whether you run it as one group or split it, you now need enough people that both halves of the raid are viable, not just the raid in aggregate. A raid that looks fine on paper but has both healers effectively in the same sub-group is not fine.

A Force is four parties grouped together, so 20 players. It is an ad-hoc construct rather than a legion one, and the 10-player raid is two parties rather than a Force. Twenty-player content is where a legion stops being able to improvise and starts needing a roster it can actually see.

What this means for building a roster now

Plan in multiples of five.

A legion that can reliably field ten players needs meaningfully more than ten members, because of attendance variance. The rough rule that survives across MMOs is around 1.5x your content size for a stable roster, so roughly 15 to 18 committed members for a 10-player raid. That same 15 to 18 also lets you field two full 5-player dungeon groups on the same night, which is convenient.

If you intend to field a full Force, you are looking at roughly 30 committed players, and at that size scheduling stops being something you do in a Discord message. For context, the largest Aion 2 legion we found self-reports around 70 members, so a Force is a serious chunk of a large legion.

Recruiting to "15 to 18 people who reliably show up" is a far more useful target than "as many as possible."

The real constraint is Odyle Energy, not roster size

Here is the thing most roster planning for Aion 2 gets wrong.

Aion 2 gates rewards behind a personal stamina currency called Odyle Energy. You clear content, then spend your own Odyle Energy to claim from your own reward cube, against your own pity counter. If you are out of Odyle Energy, clearing again does not reward you.

That inverts the usual planning problem. In most MMOs the question is "can we field a group tonight". In Aion 2 it is "does everyone in this group still have the resources to benefit from running it". A raid where half the roster has already spent their Odyle Energy is a raid that is carrying people, which is fine occasionally and corrosive weekly.

Three consequences:

1. Scheduling matters more than in most MMOs. A run that collapses at form-up has cost everyone present a limited resource, not just an evening.
2. Punctuality is a real cost. Waiting fifteen minutes for a late player is fifteen minutes of a limited window.
3. Track claims and lockouts, not points. The useful bookkeeping in Aion 2 is who still has runs and energy available this week. There is nothing to distribute, so there is nothing to run a ledger on. We wrote about why in Aion 2 DKP explained.

Practical setup

Set your activity templates around the real numbers:

• A 5-player dungeon template with one tank, one healer, and three flexible slots.
• A 10-player raid template with role targets that work when the group splits.
• A 20-player Force template if you are running that content.
• Waitlist capacity above the cap, because overbooking is the only defence against a no-show wasting everyone's window.

Guild Manager lets you set capacity and roles per activity and reuse the setup as a template, so 5, 10, and 20 are defined once rather than rebuilt weekly. Signups, waitlists, and reminders run against those templates, and attendance records against the same roster.

Caveats

Global Early Access opens 30 September 2026 for Founder's Pack owners, with free-to-play on 5 October 2026. PC only, via Steam and NCSOFT's PURPLE launcher.

Content beyond the first raid has been reported inconsistently, and sources disagree about endgame formats. Do not plan past the first raid on the basis of current reporting. Everything above reflects the Korean Chapter 1 build and NCSOFT's August global confirmations. We will update this page once the global build is verified in play.

Related reading: Aion 2 loot explained and how to create a legion in Aion 2. To set up 5, 10, and 20 templates before launch, create your legion workspace.