Perfect Alexander

No, they do not.

No, the two groups are completely independent- Light and Dark do not interact with one another.

This is done to keep the Dark Beacon's position consistent with Fate Calibration β.

If you really want positionals, you can always have the MT tank Perfect Alexander facing West, although that's rather janky.

The two stacks follow different targeting rules.

The stacks in Fate Calibration β always target the Light Beacon and the Dark Beacon, which is why players group Light vs. Dark there.

In contrast, the stacks before Fate Calibration α are random, hence the need for a priority order.

One of the two Perfect Alexander clones in the middle has a brief casting animation- this will be the clone that does not fire any Sacrament lasers, and thus will be the safe spot for the player with Defamation.

This is to hedge against the worst case scenario, where the party has to spread (Individual Reprobation).

The Dark players will bait Super Jump and the Light players have the Shared Sentence stack that will deal damage.

The mitigations are to try and reduce this damage to let everybody survive the incoming spread damage, as there is no guarantee a healer will be nearby.

You can use the center, and some groups do. However, the center has a few problems:

• Because the party is naturally south of the boss, someone calling out "center" can be misinterpreted as "center of the arena", or "center (from west-to-east)", which is the south position. Removing the center of the arena from play gets around this possibility.
• If you use the center of the arena, there is a chance the party dodges from the center of the arena to the south position. As people's cameras may be facing north at that point (looking towards the boss), the pillar of light from the first set of Exatrines blocks the screen, making it harder to tell where to stop. By using the SW position, the movement now becomes lateral, so the light pillars are less likely to obstruct players' vision.
• Because the party will dodge the Exaflares from marker-to-marker, using the center also gives the illusion that the center of the arena to the east marker (or vice versa) is a viable dodge, while the party will never dodge Exatrines that way in reality. Putting a marker to the SW puts the Exatrine positions along a single line, lowering the chance of such an accident.

The Enigma Codex allows players to see their clones in Fate Calibration α and β.

Without the Enigma Codex, there is no way to determine what debuffs players are assigned, or what attacks Perfect Alexander is going to do, and looks something like this:

That group super-shielded Divine Judgment to the point where they didn't need to Tank LB3, which let them cheese Fate Calibration α with a Healer LB3 instead.

More importantly, the group abused two exploits to clear Fate Calibration β without the codex:

1. There was a priority to how tethers are assigned; if, at a certain point in time, there are only 7 players around, the blue tether would simply not be assigned.
2. If a player jumps and is mid-air when the forced march from the Light/Dark beacons start, the forced movement time would continue to tick, but the player would not be able to move while they are mid-air, thus shortening the distance travelled from 20 yalms to 17 yalms.

Without knowing who the Beacons are, they had their PLD suicide at a specific time, placed a group in the center of the arena, and spread other players around the outer edge.

• The first exploit where the blue tether doesn't get assigned when only 7 people are alive at a specific time let the group nullify the blue tether.

• Under normal circumstances, the Light players would run into the Light Beacon, and the Dark players would be repelled away from the Dark Beacon and out of the arena.

  However, because the march distance is shortened by jumping, they were able to survive.

Patch 6.1 fixed this by adding a delay from when players lose control of their character, to when the forced march starts. Now, if you try to jump, this delay will cause the forced march to begin only after your character lands, and you will march the full distance out of the arena.

This happens when either a Light player touches the Light Beacon, or a Dark player moves too far away from the Dark Beacon.

The stacks have an anti-cheese mechanic built into them, and cannot be taken solo.

When a stack is solo'ed (even with invuln), raid-wide damage called "Faithlessness" is triggered, which wipes the raid.

This happens when either the Dark Beacon, or the Dark player with no tether forgets to go to the edge of the arena to bait the jump.

The Alexander clones target the furthest players from them to jump to- if either player forgets to bait this, then the Dark player with the blue tether (who is south) becomes the furthest player for two of the Alexanders.