Trapping Guide

== Traps inside Baldesion Arsenal ==
Inside Baldesion Arsenal, there are hidden traps spread around the narrow hallways and rooms. As a trapper, your duty is to reveal these traps with the logos action Perception L. When you use Perception, you can get one of the 3 prompts:
# You do not sense any concealed traps nearby. (Distance > 36 yalms)
# You sense a concealed trap nearby. (15 < Distance < 36 yalms)
# You discover a concealed trap. (Distance < 15 yalms)
Note that the portals inside Elemental Rooms don't have a unique prompt, when looking for portals message will still say that there are traps nearby.
There are two types of traps: explosive traps and bleed traps. The explosive traps are the large traps and if triggered, will deal 1 million damage to everyone nearby. The bleed traps are the small traps, and if triggered will give everyone nearby a 10 minute vuln stack and a bleed debuff.
Traps spawn in a semi-random fashion; their spawn locations are random on their pre-determined spawn patterns. However, there are always exceptions.
=== Trap Locations Overview ===
== Wisdom and Logos action choices ==
In order to find traps, Perception L is required. You can combine it with the following:
* an offensive wisdom like Wisdom of the Skirmisher/Fiendhunter/Elder/Duelist/Irregular
* Wisdom of the Platebearer
* Swift L
CAVEAT FOR USING PLATEBEARER OR SWIFT L
Even though using these can speed up the run when used appropriately, you will not be bringing damage during boss fights and Swift L has a long cooldown. As a consequence, Platebearer or Swift L is not really prevalent on Light Data Center. Some data centers encourage usage of these actions, so check in with your community before using these actions. If unsure, stick to your offensive wisdom and Perception combo.
== Walkthrough of Baldesion Arsenal as a Trapper ==
=== Post Art/Owain Trap ===
The first trap is just after you kill Art or Owain, at the top of the second staircase. It has three possible locations, so you can always find it if you stand a little in front of the thick line. It is an explosive trap.
=== Room before Raiden ===
There are 4 bleed traps in this room. They are always in a square pattern. Just hug the wall while scanning for the 2 traps that are furthest away from the enemies. You will have to wait for the enemies to be pulled before you can get close enough to scan the remaining 2 traps.
=== Room after Raiden ===
The next trap is a single bleed trap in the room after you kill Raiden. There are a lot of enemies roaming, so be careful you don't pull any while searching for traps. You can start by scanning on top of the stairs at the entrance for a nearby trap, if the trap is not nearby you can start scanning the rest of the room as the mobs are pulled.
=== Explosive Trap in front of Treasure Coffer ===
In the room after the bleed trap, there is a treasure coffer with an explosive trap in front of it. Like the first trap it has three possible locations, left, right or middle. You can always find it if you stand a little in front of the thick line.
=== Elemental/Portal Rooms ===
Next you will be heading down the hallway with elemental rooms. Here you will need to use Perception to find a hidden portal. Just like traps, if there is a portal nearby, the "You sense a concealed trap nearby." message will show up even when all the traps are found.
Each room have different characteristics:
* Earth and Fire: 0 traps, 1 possible portal spawn location at the back middle of the room
* Lightning and Wind: 1 trap, 2 possible portal spawn locations at the back corners of the room
* Water and Ice: 2 traps, 4 possible portal spawn locations spread around at the back of the room
In the first two rooms, Earth and Fire, there are no traps. This means that if you sense anything in these rooms, it must be the portal. If you go slightly into the room, you can use Perception and detect if there is a portal without having to kill any of the enemies. Just be careful, if the enemies that are close to the entrance are looking at you, you will likely pull them when going for the scan. Just wait a bit until they turn around. There are 6 enemies in both rooms, so make sure you account for all of them.
The next 4 rooms always have traps, so there is no need to peek into them early, as you won't be able to tell if it is a portal or not. There is 1 trap in both Wind and Lightning, and 2 traps in both Water and Ice. 
When the tank goes into a room to pull mobs, you can go in and scan the entrance to make it easier for the tank to move around. The tank may not be able to pull all mobs, so be careful before you start going in to look for the traps. When you have found all the traps in the room, use Perception one more time to check if there is a portal in the room. If you sense anything it will be the portal.
=== Post-Portal Bleed Trap ===
After you go through the portal and down the stairs, there is another room filled with enemies and a single bleed trap. Just like with the room after Raiden, you can start by checking down the stairs at the entrance to make it easier for the tank to move. Just be careful with the roaming enemies. Once the last enemies in the room are pulled, you can run ahead to the support rooms.
=== Support Elemental Rooms ===
Next you will go down another hallway with elemental rooms. These rooms have 1 trap each with 4 possible positions in the room to the cardinals of the blue circle. This means you can always find the traps using just 2 scans. First you scan for the close trap at the edge of the dividing line, if it is not there you can move close to the blue circle and scan for the rest.
When you have found the traps in the support elemental rooms, your job is usually done and you can switch away from perception to a damage action. Just make sure to ask first, the raid leader may want to clear additional rooms later to have more traps available for Indom users.
== Tips and Advanced Strategies ==
=== Finding the Portal Room Treasure Coffer ===
In the portal elemental rooms, there will be a treasure coffer in one of the rooms. It can be very helpful to look for the chest and announce the location in yell chat or voice, as the raid will want to clear that room first in most cases. Treasure coffer have 6 possible spots it can spawn, as can be seen in the image below. 
The treasure coffers in Water and Fire can be difficult to spot, as they are hidden by the decor. The treasure coffer in Water is hidden behind a small pillar, but you can still see the glow effect if it is there.
The treasure coffer in Fire is hidden behind a pillar on the right side of the room. The treasure coffer can be spotted by looking for it's nameplate. If your nameplate size is set to normal or higher you will be able to see the first few letters of the nameplate.
=== Earth and Fire Rooms ===
There are 6 enemies in these rooms and can change directions randomly and quickly. It is very risky to check for portal in these rooms but it can speed up the run. If mobs are not looking your way, you can quickly go halfway into the floor tile change to scan for a portal.
=== Wall Percepting ===
It is possible to scan for portal or traps through the walls. This only works for Lightning, Wind, Water and Ice rooms as portals might spawn at the corners of these rooms. After the room is cleared you can use Perception next to the wall of adjacent room. Do note that it is not always possible to say if you detected a trap or a portal.
== Miscellaneous ==
* After Raiden is killed, all the traps before him (Art/Owain explosive traps and 4 square bleed traps) will despawn.
* The vulnerability stacks you get from bleed traps can only be cleansed by pulling and resetting the boss after them (i.e. 4 square bleed trap vulnerability stacks can be cleansed by pulling and resetting Raiden, vulnerability stack from post-support room bleed trap can be cleansed by pulling and resetting Absolute Virtue).
* After Absolute Virtue is defeated, all the remaining traps inside the instance will despawn.
* Traps can not be reflected by Reflect, nor can be mitigated by Spell Shield/Solid Shield.
* A Ninja can outrange the explosion from an explosive trap by using Shukuchi.