Obsidian Sanctum Farm

The Obsidian Sanctum Farm (short OSFarm) was a good way to get the Ultimate Dominator title. With only 10 players per side you can easily reach 2,000 kills per hour. More players will allow more kills per hour. This method is completely legitimate and allowed by Arenanet Kills in the Obsidian Sanctum give no loot, so this farm is only good for raising the achievement and experience points.

Walkthrough

1. Make a lvl 80 Guardian/Elementalist (no power or any other gear equiped)
2. Go to Obsidian Sanctum
3. Join parties with the other server 2/5 or 3/5
4. Jump down and & AoE the flag
5. Stand in the AoE, USE RETALIATION, you till tag everyone
6. Respawn ASAP and jump back into the stack

What you need

• A cooperative partner server that also wants to farm a lot of kills.
• Be completely naked, remove or bank all of your armor and trinkets.
• Sigil of Luck. (This will give additional retaliation)
• Sigil of Speed. (To get swiftness and back into the fight faster)

Farm methods

Depending on how many Servers participate there are different Methods to be used. Each of the Viable Classes has a Running Build (for a 3 Server farm, see left picture) or a Jumping Build (for a 2 Server farm, see right picture)

Builds and their usage

Guardian Running Build

• Place Symbol of Swiftness on the flag.
• Activate retaliation and run inside the AoE. (Virtues should also activate retaliation)
• Activate aegis when next to enemies to AoE when it breaks.

Guardian Jumping Build

• Jump or leap and land on the flag to trigger protectors impact trait.
• When your Aegis breaks you get retaliation (Aegis is refreshed when you revive, don't use Virtue of Courage)
• Give retaliation and other boons to your allies

Necromancer Running Build

• Cast Corrosive Poison Cloud or Well of Suffering while running in. (not both)
• Focus on summoning your Bone Fiends while inside the AoE
• Enter Deathshrowd to gain retaliation.

Necromancer Jump Build

• Summon a minion and when you or they die Death Nova will activate leaving a low damage AoE
• Enter [Deathshrowd] to gain retaliation and stability.
• Leave [Deathshrowd] to die and get back in quicker. (to make full use of the [Death Nova] trait)

Elementalist Running Build

• Camp fire attunement and cast Lava Font on the way in.
• Dying in the AoE will drop a lava tomb.
• Don't use Meteor Shower, it's too slow.

Elementalist Jumping Build

• Camp fire attunement and cast [Lava Font] on the way in.
• Dying in the AoE will drop a lava tomb.
• Don't use [Meteor Shower], it's too slow.
• Lightning Hammer to use the leap spot.