You can find the Bloodmaul Slag Mines dungeon entrance within Frostfire Ridge, Draenor.
The coordinates are (50.7, 25.3)
1. Slave Watcher Crushto
/i Interrupt Ferocious Yell. Don’t stand in front boss for Earth Crush (giant spike). Boss leaps on player ordering miners to attack them, kill attacking miners.
/i Kill Ogre & adds. Avoid fire balls & moving spikes. Interrupt Firestorm. Boss releases, dispel Withering & Dancing Flames on players. Avoid landing area & kill the Molten Elementals quickly. They cast Magma Barrage & Volcanic Tantrum, interrupt these.
Heroic Differences: Dancing Flames will be placed on two players.
/i Dodge the fiery boulders (avoid red swirls). Avoid fire patches on floor. Wind pushes everyone down bridge, can still cast if don’t run into wind.
Heroic Differences: Boulders roll back up the bridge. Cast speed is reduced by 100% if stand near boss.
/i Move out magma pools under your feet. Interrupt Molten Blast. Kill the Unstable Slags quickly before they reach the kilns, use slows.
Heroic Differences: Dispel Flame Buffet on players.