Here is the Obsidian Tank build that we used for Slavers Exile.
[build (PvP) prof=w/e earth=12 strength=12][glyph of concentration][Obsidian Flesh][optional][stoneflesh aura][grasping earth][endure pain][dolyak signet][signet of stamina][/build]
Template Code: OQYSk4IPJDtBA4r2K2KplBLOptional Skills:[Pain Inverter] : For some damage output (useful in Forgeweights level)
[Armor of Earth] : For some extra armour
[Feel No Pain] : For some health regeneration and extra life if used while drunk (useful in duncans level)
[You Move Like A Dwarf] : For knocking down and snaring pesky monks who refuse to die
Usage:The object of the tank is to gather all the aggro so that the nukers can come and kill everything.
The rest of the groups should be out of the tanks aggro bubble range and set up the spirits. Make sure you have your bonds and enchantments on.
Now, when u aggro the group you want to try to be on a corner or against a wall, so that the enemy just ball up around you. Usually it will mainly be the melee enemies that ball up around you but as soon as the nukers attack the enemy casters will move forward.
When you have got the aggro, call when you use [[Grasping Earth] so that the nukers know when to come in.
This is all you need to do really
Tips:When you are taking, try not to move at all.
Keep up [[Signet of Stamina] permanently and use [[Obsidian Flesh], [[Dolyak Signet] and [[Stoneflesh Aura] as soon as they recharge.
Before you aggro, use [[glyph of concentration] so that when u cast [[Obsidian Flesh] you wont get interupted.
On Duncans level watchout for pop up Restless Dead and the patrols of dwarves, you don't want to be fighting them at the same time.
Before aggro'ing, make sure there are no spirits of disenchantment nearby.
On Selvetarms level you can just run into the room with the undead and grab the key and even though you will get 15% Death Penalty it saves alot of time. You can also run past the Chained Clerics on Selvetarms level as they are a pain too kill, but watch out for the Crypt Slashers that pop up.
Hope this helps and good luck with Slavers!