Path of Exile 2 Grand Expeditions: unlocking the Expedition Atlas skill tree

Since update 0.5.4, rolled out on June 25, 2026, Expedition is no longer a side encounter in Path of Exile 2: it's the economic pillar of the Runes of Aldur league, and it now has its own Atlas passive skill tree. Since subsequent patches touched neither balance nor content — 0.5.4c on July 16 added support packs, 0.5.4d on July 24 fixed league migration, 0.5.4e on July 30 and its August 5 hotfix only concerned shaders and vertical sync —, everything you invest in Expedition today will remain valid until the next major update.

The catch is that this new tree doesn't unlock like the others. Its points aren't earned by progressing through the Atlas: you have to defeat the bosses of the Grand Expedition quest, and those are only found in the ocean revealed by Expedition Logbooks. Many players have been detonating explosives for weeks without ever allocating a single point.

A note on terminology: Grinding Gear Games only publishes its patch notes in English. Items, runes, zones and bosses are given here with their French client wording. The Atlas passives, Atlas master options, and a few ocean islands have no publicly documented French equivalent: they retain their English names.

What 0.5.4 actually changed

Three additions really weigh on how you play Expedition.

• An Atlas passive skill tree dedicated to Expedition. It works like the other Atlas branches, but with its own point pool, fed exclusively by the Grand Expedition quest.
• Liquid Verisium. This new currency immediately triggers a Runic Vestige encounter with a random rune-marked inscription. Farrow only puts it up for sale after the Feeling Lucky? passive has been allocated, and it's paid for with raw Verisium.
• Modifiers specific to Grand Expeditions. Each Grand Expedition receives one or two zone modifiers. Three new ones have appeared: more runic monster markers, duplicated runic monsters, and zones containing additional Vestiges.

Two more discreet adjustments also change profitability. Vestiges now randomly determine the rune slot that spreads to subsequent monsters, rather than which rune spreads according to each recipe; the relevant rune is now highlighted in the rune recipe list, which finally allows planning a chain instead of just enduring it. And the chance for a runic monster to spawn as a rare now correctly accounts for your increased rarity and rare monster chance bonuses.

Unlocking points: the four Grand Expedition leaders

Points for this tree are earned by defeating each boss of the Grand Expedition quest. These are the four faction leaders inherited from the original mechanic, each tied to a specific ocean island:

These islands only exist in the portions of ocean revealed by an Expedition Logbook, an item that only starts dropping from level 78 onward. Good news inherited from 0.5.2: every ocean section revealed by a logbook contains at least one guaranteed Grand Expedition. And since 0.5.4, an icon on the end-game map directly flags which ocean maps have one.

One caveat, though: 0.5.4b reclassified Medved, Vorana, Uthred and Olroth as powerful map bosses, giving them noticeably more life than before July 2. If you'd been putting off these fights thinking you'd dispatch them later with an average character, that window has closed. Plan for a proper boss setup, with sustained damage over time rather than a single burst.

To keep the machine fed with logbooks, the most reliable source remains the boss Styrn (Styrn, Fallen Knight of Aldur), who has consistently dropped an Expedition Logbook since 0.5.3. It's the only point in the system where you're not at the mercy of randomness.

Which notables to allocate first

Two notables are explicitly identified in the official patch notes, and they happen to be the two that structure the early part of the tree.

• Feeling Lucky? unlocks the sale of liquid Vaal Vessel... rather, Verisium at Farrow. It's the only notable that turns a dormant resource — your stacks of Verisium — into on-demand encounters. Take it first if you're piling up Verisium without knowing what to do with it.
• Double or Nothing has, since 0.5.4b, offered an additional option that lets you change nothing. The gamble is therefore no longer mandatory: you can allocate the notable for the path it opens up without being subject to its variance on every encounter. This is a safety net that didn't exist at the patch's launch, and guides written in late June don't account for it.

The rest of the tree comes down to a simple trade-off: multiply Remnants, or multiply Expeditions. The first axis feeds rune crafting and recipes with eight sockets and above, the ones that produce the interesting alloys — since 0.5.2, in fact, the weakest three-socket runic inscriptions no longer drop at tier 14 and beyond, and two eight-socket alloy rewards have been added. The second axis favors raw loot volume. If your character is lacking in damage, the second is safer: every rune placed on a Remnant strengthens the monsters around it.

One last thing deserves your attention on the Atlas masters' side. The Doryani's Refined Formula option limits Expeditions to a single explosive, which made them unworkable. Since 0.5.4, Grand Expeditions partly escape this constraint and retain 5 explosives. That's still very tight, but the combination becomes playable again if you're after fast maps.

Managing your 15 explosives without wasting the map

Since 0.5.3, a Grand Expedition is no longer played with 20 explosives but with 15. The reduction isn't a punishment: it's been offset by much richer chests and a higher number of Remnants. This maximum number of Remnants increases with the tier of the Waystone used, and reaches its peak at tier 15 and above. Practical takeaway: farming Grand Expeditions below tier 15 means leaving value on the table.

Chest contents were also reworked at the same time. Basic weapon and armour chests have disappeared in favor of currency chests, unique item chests and Waystone chests, alongside mysterious chests and jewellery chests with a very large rarity bonus. Your explosive chain should therefore prioritize chests and big runic monster markers, not the amount of ground covered.

Two habits to pick up since 0.5.4b. First, Grand Expedition modifiers now show up in the zone's stats list once you're inside: check it before you plant the first explosive, since a rune-monster duplication modifier completely changes the optimal route. Second, a logbook that adds a boss Expedition now preferentially replaces a normal map rather than a Grand Expedition — so you no longer burn through your best maps by chaining logbooks.

The runes that decide profitability

0.5.3 substantially increased the effect that rune modifiers applied to monsters have on rewards: in most cases the gain was doubled, sometimes more. Three runes shape the decision at every Remnant.

• Rune of Power: it upgrades all other rune modifiers on the Remnant into a more powerful and more rewarding variant. It's the most efficient multiplier in the mechanic, and it's part of the priciest recipes.
• Rune of Life: monsters share their life pool. Excellent for an area-damage character, catastrophic for a single-target one.
• Rune of Pledge: a monster summons allies. It inflates the number of targets, hence the loot, but it's also the one that turns a poorly prepared encounter into an impassable wall.

On the defensive side, Rune Backup remains the league's safety net: it absorbs damage that would otherwise reduce your Life to 0, with your Life dropping to 1 instead. It regenerates by default at 5% per second, but it doesn't protect against Life loss that doesn't come from damage taken — a nuance that regularly kills characters via damage over time. Good news: since 0.5.3, imbuing a rune into a high-level non-unique armor piece costs about 20% less in defenses than before, for the same Rune Backup, and items already imbued were updated automatically.

Where Path of Exile 2 stands as of August 6, 2026

The Runes of Aldur league, launched with 0.5.0 on May 29, 2026, has been running on 0.5.4e since July 30, with a patch on August 5. This latest patch is purely technical: reduced shader compilation times, GPU crash recovery under Vulkan, and most notably a switch of the default vertical sync setting to locked mode, as the adaptive method was disabled due to inconsistent frame pacing. If you were experiencing micro-stutters during Expeditions, check this setting.

On the schedule front, Grinding Gear Games announced on July 30 the launch of ExileCon qualifiers, along with an appearance at gamescom 2026. In other words: no content update is imminent. You have time to finish the Grand Expedition quest, fill out the Expedition tree, and make the most of it before the meta shifts.

The order of operations if you only have one evening

Start by stockpiling Expedition Logbooks, systematically going through Styrn to secure guaranteed loot. Reveal an ocean section, spot the Grand Expeditions icon on the endgame map, then go take down the four faction leaders in whatever difficulty order your character can handle. Every boss defeated grants an Expedition Atlas passive point.

Allocate Feeling Lucky? as your first or second point, dump your stacks of Vérisium into liquid Vérisium, and only open Grand Expeditions at tier 15 or higher. It's the only sequence that turns Expedition into a stable income source rather than a lottery, and there's no reason to wait: the content is locked in place until the next major update.