Ermal’s Expedition Vault changes how you should think about ARC Raiders BluePrints when preparing for an Expedition. A normal reset can remove much of the progress you have built during a run, so the five protected slots are extremely valuable. Instead of treating them as extra storage, it is better to use them for items that are expensive, rare, or frustrating to farm again.

For players collecting ARC Raiders BluePrints, the vault can also become a useful long-term safety net. A learned blueprint does not automatically give you a physical item that can be stored there. If you find another copy of a valuable schematic Topside, however, that duplicate can be worth protecting instead of selling or dismantling it.

Why the Five Slots Matter

The biggest mistake is filling the vault with items simply because they have a high selling value. The better question is how difficult the item would be to replace after an Expedition reset.

Five slots disappear quickly when you start looking at rare materials, weapons, and blueprint duplicates. Common resources are usually poor choices because you can collect them again without too much trouble. A rare schematic or endgame component is different because replacing it may require several successful runs.

This makes the vault more like an emergency reserve than a conventional stash. Every slot should have a purpose.

Keep Rare Duplicate Blueprints

Physical duplicate blueprints are among the strongest candidates for the vault. Schematics such as the Seeker, Survivor, and Wolfpack can be especially attractive when you already know them and find another physical copy.

The important distinction is between knowing a blueprint and possessing a physical duplicate. Once a schematic has been learned, you still need to find another physical copy Topside before you can place that duplicate into the vault.

That means a duplicate should not automatically be treated as junk. If the schematic is difficult to encounter, protecting one copy can save considerable farming time later.

I would generally prioritize a rare duplicate over a common blueprint. There is little reason to spend one of five slots protecting something that regularly appears during ordinary runs.

Consider Rare ARC Components

High-tier crafting materials are another practical choice. Bastion cells, Queen Reactors, and Matriarch cores can become particularly valuable when you are working toward expensive projects.

These materials have an obvious advantage: they can help you resume progression immediately after a reset. Rather than rebuilding your material stock from nothing, you can use your protected reserve toward an important upgrade or crafting requirement.

Still, rarity alone should not decide everything. If you have a specific project coming up and already know which component you need, that material may deserve priority over something with a higher theoretical value.

Rare Weapons Can Save Early Progress

A hard-to-find weapon can also be worth keeping. Starting another Raider with reliable equipment is much more comfortable than having to rebuild your entire loadout after every reset.

I would not use a vault slot for a weapon that is easy to replace. A common firearm does not offer enough long-term benefit. The better candidates are weapons that you rarely encounter or would otherwise spend several runs trying to recover.

Think about the time required to replace an item rather than only its market value. That approach usually produces better vault decisions.

Do Not Mistake Stash Expansion for Vault Protection

Ermal has another feature that can cause confusion. The Expedition Vault and Ermal’s Stash Expansion are not the same thing.

Stash expansion should not be treated as permanent protection for Expedition resets. The expanded stash space resets when you leave on an Expedition, while the five dedicated Expedition Vault slots are designed to preserve selected items across runs.

This distinction is important because putting something into the wrong storage space can lead to an unpleasant surprise after departure. Before starting an Expedition, check that the items you genuinely want to preserve are inside the correct five-slot vault.

Unlocking the Vault

There is also a progression requirement before Ermal becomes useful. Ermal is located on the Speranza lobby floor, and players need to reach Level 25 before they can barter with him.

The slots are not cheap either. Each one costs roughly 200,000 material value to unlock, making the system something you gradually invest in rather than an early-game convenience.

Because of that cost, unlocking a slot should ideally support your wider progression plan. Once you have all five available, the same principle still applies: do not fill them with ordinary loot just because the space exists.

A Practical Five-Slot Setup

For a balanced setup, I would start with one rare duplicate blueprint, one important endgame component, another valuable schematic duplicate, one difficult-to-replace weapon, and then use the final slot for whichever rare material or weapon currently supports your next goal.

This setup is not permanent. Your priorities should change as your crafting projects and collection develop. A component may be extremely useful this week but less important once you have completed the project it supports.

The main advantage of the vault is flexibility. You can adjust the contents before each Expedition instead of following one fixed list.

Final Vault Check

Before leaving Speranza, take a moment to review every slot and ask whether each item would be frustrating to farm again. If the answer is yes, it probably has a strong case for staying protected. If the item is common and easy to replace, save the slot for something better.

The same logic is useful when managing ARC Raiders Coins for sale purchases or other resources: value should be judged by usefulness and replacement difficulty, not simply by a large number attached to the item.