Heroic Slave Pens

General Info.

The Slave pens is the first 5 man instance of the Coilfang Reservoir set in Zangermarsh and is probably the easiest herioc dungeon in outland. This instance will grant you Cenarion Expedition rep till friendly on normal mode and through till exalted on heroic. In order to unlock this instance in heroic mode you need to be honored with the Cenarion Expedition (previously it was revered but was reduced to honored in patch 2.1.2), after which you can purchase the Reservoir Key from Fedryen Swiftspear the quatermaster.

Enemies are typically Naga (coilfang), bokstrok and broken (wastewalker). On normal mode enemies are between 62 - 64, on heroic they are 70 plus.

Bosses.
There are three boses located in this instance:-
Mennu the Betrayer
Rokmar the Crackler
Quagmirran

First Boss - Mennus the Betrayer.

He wanders up and down the ramp that leads onto the second boss. The mobs at the bottom of the ramp pull in two groups, although neither of them need to be cleared as Mennus can be pulled at range on the ramp without agro'ing these groups, it is advisable to kill at least the first group.

In both normal and heroic mode this fight is pretty much the same, he doesn't do a large amount of damage but he does have a range of totems at his disposal which must be destroyed A.S.A.P especialy his healing totem. The totems are easy to take down, a simple swipe by any melee dps (OT, rogue etc) will suffice or a wands from casters.

Mennus corrupted nova totem is the only one that needs to be avoided as it will go off instantly if hit, if this totem is causing you problems the tank can simply backup and move Mennu away from it, this is more important in heroic mode.

Second Boss - Rockmar the Crackler.

In both modes Rokmar is a basic tank and spank, he hits hard, has an enrage ability, has a mean frost AoE (water spit) and if the tank loses agro its safe to say a wipe is guarranted. This fight is particulary hard on the healer and they can quickly run out of mana.

Water spit has a 40 yard radius and cannot be counter spelled, kicked, shield bashed, earth shocked etc. In heroic mode this can hit for around 1.5k. Healers can actually avoid this is if the tank positions themselves between Rockmar and the healer, therefore there heal range should position them just outside Rockmars AoE range. Any frost resistant gear/potions/pally aura will help make this fight easier.

Roxkmars grievous wound attack is a bleed effect which in heroic does around 1.1k every 2 seconds. It can be removed by fulling healing the hp of the party member affected.

I read that if the tank goes down and Rockmar is no where near death he can be reset by everyone jumping in the southwestern pool. Giant crab and he can't swim, go figure

Thrid and Final Boss - Quagmirran.

Another basic tank and spank fight and is also pretty much the same fight in both modes with the only change in heroic being the extra damage he does at 2.2k melee on a decent geared tank. He is not too difficult but does have an annoying poison AoE (posion bolt volley).

Make sure before starting this fight you free Naturalist Bite in located in the cage in the same room. Be ready as three naga will spawn and charge the group as soon as you free him. Once they have been defeated and providing you haven't been stupid enough to let Bite engage in combat and die, when you talk to him he will give you Mark of Bite, a nice 30 min buff that grants you 110 nature resistance and +5% on all stats, which is a big help with Quags poison DoT and AoE.

This buff also stacks with shamans nature resistance totems or a hunters aspect of the wild, however the totem and the aspect do not stack together. Mages can use Dampen Magic on everyone par the tank to help with the nature damage.

The tank should pull Quagmirran to the top of his slope so ranged dps can stay as far back as possible and spread out and so they won't be out of LoS for heals.

Poison bolt volley is impossible to avoid, it even ignore LoS (line of sight). Ranged dps and healers should avoid getting to close to Quag esp as his frontal cleave is very nasty and can hit for 5.5k on leather. They should also spread out incase they are targeted for acid geyser, if stood too close to the healer when acid geyser goes off it's AoE will get everyone nearby. Melee dps should make sure they stay away from ranged dps and the healer to avoid acid geyser spilling onto them and also not to stand behind Quag.

Extra quest npc.

When in heroic mode, Skar'this the Heretic prisoner can be found in the room before Rokmar the Crackler (second boss). This quest used to be the required attunement in order to be able to enter the Serpentshrine Cavern and come face to face with Lady Vashj, however this was changed in patch 2.1.2 and you no longer require attunement to enter the Cavern. This quest can still be completed if desired and involves killing Gruul the Dragonkiller and Nightbane in Karazhan.

The Slave Pens is the best Heroic instance to do if your farming Badges of Justice particularly as it allows more skipping of trash mobs then any other.