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1.	Grimrail Depot Challenger
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Comment by jjanchan

CHALLENGE MODE TIP - Nitrogg Thundertower (Boss 2/3)

The following tip can shave a large chunk of time from the 2nd boss encounter, giving you that extra boost to get Gold!

The first phase of this boss involves fighting Nitrogg Thundertower in the cramped rear portion of the train car, during which the group should spread out to minimize the damage from the Blackrock Mortars and Blackrock Grenades that he casts.

At 60% health, he transitions to Phase 2, wherein he retreats to his Assault Cannon in the front of the car, and the sides of the train car open up allowing access to the middle and front portions of the encounter area.

One of the time consuming portions of Phase 2 involves killing adds, looting them and using Homing Shell on the Assault Cannon. Each shell does 25% of the cannon's health, so 4 shells alone are required to break Nitrogg out (or 3 shells and another 25% of direct damage to the cannon).

It's possible to annihilate the Assault Cannon with a SINGLE Homing Shell thus shortening this encounter SIGNIFICANTLY.
To do so, you need 1 Shaman, or 2 Hunters (a single Hunter works, it is just less effective and won't shorten the fight by as much).

A Shaman should be using with Charred Glyph.
A Hunter should use Deterrence with Charred Glyph.

Below are the steps to follow for this strategy:

The tank and all DPS, including the Shaman/Hunter, should move to the front of the car. The Shaman/Hunter should move right up next to the Assault Cannon and start attacking the Assault Cannon (to "bait" the Slag Blast).

If the Shaman is a healer, have another DPS start attacking the cannon.
The remaining DPS, tank and healer should start attacking the first two adds, which will appear at the front of the car, consisting of a Grom'kar Boomer and a Grom'kar Gunner. The Grom'kar Boomer should be the DPS priority.

All group members should remember to line-of-sight when targeted by Suppressive Fire.
Once the Grom'kar Boomer is dead, it's body becomes lootable and one DPS (who should be previously assigned) should loot the Blackrock Mortar Shells and get into the Blackrock Turret closest to the Assault Cannon, ready to fire it when the time is right.
As soon as Slag Blast appears (fire on the ground around the Assault Cannon), the Shaman should drop the glyphed and ALL party members (except those targeted by Suppressive Fire and the one DPS in the Blackrock Turret) should run INTO the fire (Yes, it's ok to stand in fire here!) and someone should track of the stacks of Slag Blast on the Assault Cannon.

The more people that stand in the fire, the faster the stacks will appear on the cannon.
Note that all the while all of this is happening, more adds will be spawning and should be picked by the tank.
Once the Assault Cannon has 9 stacks of Slag Blast, everyone should move out of the fire, and the DPS in the Blackrock Turret should use Homing Shell on it. This should INSTANTLY destroy the cannon, and initiate the final phase of the fight, where Nitrogg Thundertower reappears and needs to be DPSed down. No further adds will spawn at this point, although all existing adds will remain.

A Hunter can used glyphed Deterrence to the same effect, but a single hunter may not reach 9 stacks of Slag Blast on the Assault Cannon, even with 2 charges of deterrence. Two hunters would definitely be effective in doing so. Even if not quite hitting 9 stacks, a hunter performing this trick will still shorten the length of the fight (likely requiring only 2 Homing Shells to break Nitrogg out, rather than 3-4 normally).
It is essential to be quick about moving out of the fire after 9 stacks are reached, as the Slag Blast will stack on party members quickly once has expired.
Listed at the end of this post is a WeakAura that can be used to track the stacks of Slag Blast, with an alert once 9 stacks are reached.
DPS players should kill any remaining Grom'kar Gunners, loot the bodies, jump into the Blackrock Turret and use Shrapnel Cannon to help finish off Nitrogg and the remaining adds quickly.

NOTE: In theory from a Warrior should work the same way as , but this hasn't been tested, and it is unknown how many stacks of Slag Blast you can reach with this ability.

TL;DR version: Have a DPS attack the cannon at close range. When fire appears around the cannon, drop the Shaman should drop the glyphed , have everyone move into the fire, and have someone shoot the Homing Shell from the Blackrock Turret once there are 9 stacks of Slag Blast on the Assault Cannon. Kill the boss and remaining adds.

A VIDEO GUIDE to the above strategy is available here. Thanks to Jace DK for this great video.

There are a couple of WeakAuras that can be helpful when executing this strategy.

To use them, you need to install the WeakAuras 2 addon, then do the following:

Type /wa in chat to open the WeakAura interface
Click New, then select Import
Copy the text in the following code box and paste it into the WeakAura import field, then click Done
Click the "Import" button on the confirmation in the middle of the screen to add the aura

Below is a WeakAura string that can be used to track stacks of Slag Blast on the boss, with a custom alert once 9 stacks are reached.

de0ulaqiffQlPaIBrvv7IQsnmkQJPiltP8muY0uIRjL2gf5BkjJtbDoLQwNIcCpfqAFkGQdQKQwir8qLuMOsLUOIkBukAKkkYjvGMjrIBQKk7uu9tQkgkvLSuLkEQQPkPRQaSvff1xvuiNvrbTx4VeLbRqDyuTyIQhtjtMsDzHntHplkJwkCAeRwbuETIsZMWTrXUf53uz4uLLlXZrA6KUUuTDfv9DIKgpvvopk16jsTFfYycvCoQqXP4B(EY3M990kCgCBCBuX9ZhddAOiFvRV3VF)Q22HT7zTQfp8ZJNSdBibNgcdF5ijfxIp1QpRtkZ1SIZTTjkXL4czAHKLffkQqXlrgXLQS9c8SIR7HZ2hddAOiNv7k8uNPwizzrHI8jCHJBJkUYfrsrfNPlucQqHIBtmmiwDHYgvCMUqjOcfkEHBfOIZ0fkbvOqXn4wkXLqfNPlucQqHI3PHmlbNsHC8IteOIZ0fkbvOqHItSXVGNnASebNQqXTqf5tOIBtOEco7A4NI3KuIrJ1gXOXVrieZyCILlbj4gUK2uWZO4(mGQugmFoCEIWWvIlHkov5ffvCLTxG7vcAO4ELGgkUb3oGIZWjjuXv2EbUxjOHI7vcAO4CHxdUV6cAaf3GKi0gOIRS9cCVsqdf3Re0qXn42buO4AHKLffuXPUEXk6jII7j4SJco11lwb(DcEz04MCgIGWl429cxjUe(gENgR56jfsWPEHfXGynGerXL7O0j8EIO4mbJ8OGBhY7ggv2Eb(mT(DwxZbifClxpP(4ffU6k4d8bkENgYOEHqmOnKJ3tX8rsXvctyJt9cHyqB8jtMnBYeo1leICotGVBW4kCbrAskB04DC8cEmFKu81CmY56OXsXLHB56jfFpENgYOUEXkGC8onKr9cHiNZeqcEIZe4nfCAJrJLWtz4DAiJ66fRONikKJB1PQJrwdIDGReMWgpXzckQiFc)cE2OXseCQcfkovjwZYE3EHRexcYXnCjfFMj(Xl4ncswdfnnTQTDXmRvSmzEJL5fZWW)LH4ch3gv8onKrjshqcENgYsX8rbYXL2Lc8blU0OX76SMLI3PHmPDPaYXTjggeRUqzJkoLKYebUvdUqePSaNPlucQ4wn4crKYcibku8IteOIZ0fkbvOqXlCRavCMUqjOcfkUb3sjUeQ4mDHsqfkuCLlIKIkotxOeuHcfVtdzwog5CfsWPePduXPKuMiW94fLnotxOeuX94fLnKafkuCdxspr6a5Bl42eQNGZ(k3Awk(aHIxImIlvz7f4A4NIB5eUcQiFdnhU380gRTnZlMg2Un1cd)BzHCwO5WLLnZltMAxwwy1o1cd)BzbfNKiQmlhJNi0Wg5t4woNW2j1eKJtsZhfAa54uLBnlDnxs5KetKu8bZ)G7ohU0ohdYnJZ7QdsWTdkx7fUgqoo32MOexIlKPfswwuOOcfNBPexIIkov5ffvCBNSmHtQqcEMWjvzgfotGpJc(SRVx40zWf8mjcovHcfxQeBTbA2UIvR5wwR2w22Mwwmdd)xAXj24xWZKi4uDNDNHJgVH7Npgg0qrU)S27BwlBMxMmp1AARfp1zQfswwuOiFcNTpgg0qrZHRg2oCVPvM2pCzflZSGH)lRWPk3AwQVCKKIV2C5152bxd)01CcxbvKpH8jKVH8jKZcnho0u7EZ7h2UyYKjtBSGH)TSq(cYNGcf5BOI76QGKcib3Mq9eC21WpfhNgcdF5ijfxIp1QpRdxlKSSOGko11lwrpruCpbNDuWPUEXkWVtWlJg3KZqeeEb3Ux4kXLW3WPEHfXGynGerXL7O0jC7qE3WOY2lWNP1VZ6AoaPGB1PQJrwdIDGReMWgN6fcroNjW3nyCfUGinjLnA8ooEbpXzckQiFc)cE2OXseCQcfpMpsk(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)Nw1ItSXVGNjrWP6OXB4woHRGkY3qZH7npTXABZ8IPHTBtTWW)wwiNfAoCzzZ8YKP2LLfwTtTWW)wwqXPk3AwQVCKKIV2C5152bxd)01CcxbvKZcnho0u7EZ7h2UyYKjtBSGH)TSGcfk(8iFAzBckaa

Below I've listed a WeakAura string that can be used to notify you when is active. It can be modified for use with other spells.

dadDdaGEKk1UubMjfuZLcz2qCBQStiTxYUHA)cj)KcyyQq)gvdLcYGfsnCboisvoMk5Civ1cPKwksfwmfQLtvpePIEkyzQipxKPIYKPutx6Icbxw56i2isLSzbTDKYhPe9zK8DHqpwLA0QGgVq0jvrDyrDAvDEH6Vu03OannkH1LycEbNXD(W89m68nhNmccgcIjAUe)mT0Zjy7htX4DobjbNo46GJhCzqbob2cSftabx)trnVyckVZXIdMqTqvq9pf18IjOXbtqQ5ssciPzwENdn7MSkGKM5JPnFAYybJ2WvaJ35euENdn7Mal9Cc2(XurfnJ35eqWJ2WvqMuUasAMe8xzvq5DowCWeQfciPzwENJfhmzvvWH7PoScL(hfGWZ2IjW(dd)BcsJftGJG0xmvvb(89etGJG0xmvvbnJmCftGJG0xmvvbH57(CSycCeK(IPQkWZrMycCeK(IPQQkiKJl809e6Lbf4h1ZXS4Gj4V5ybp(R5n3fGSoBHEjitkxgl4TfyPNtW2pMsq22(7ZXzeZ6FkQ5tIj0lXeu)trnVycACWeKAUKKacE0gUcYKYfqsZS8ohA2nzvWOnCfW4DobjIXJ2W1q(f(rkamuemSHfqWFfeGKJNxq5Do0SBcOR3VOIociZnCZirfnJ35eqsZKG)kRckVZXIdMqVeKigpAdxGeg(rkWKoPhWmbg9OdMasAML35yXbtwfqsZ8X0Mpnzvvabx)trnVyQQQcI4B3dfk9pkisdegMwf6jlokatCm)trnFsONeeBGWW0QqVoDuG9NcqYXNV5ybNXD(W89m68nhNmccgcIjAUe)mT0Zjy7htX4Dovb0e6LfNUuLa

To modify the aura to work for a buff like Deterrence or Spell Reflection, do the following:

Select the "Trigger" tab
Change the "Type" to Aura
In the "Aura Name or ID" box, type the name of the buff (e.g. Mass Spell Reflection) and click "Okay"
Make sure the "Unit" dropdown shows "Player, and the "Aura Type" is "Buff"

Thanks to Draemii - Tarren Mill EU, Nexxer - Nordrassil EU, Gothunter - Stormrage US, and Babyjace - Kil'jaeden US for some of the information in this post, including the Slag Blast WeakAura above, which is slightly modified from its original form.

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Grimrail Depot Challenger

Complete the Grimrail Depot Challenge Mode.

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Grimrail Depot Dungeon Strategy Guide

Grimrail Depot Challenger

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