Searing Gorge 47 - 48
Once you reach Thorium Point(1), accept all of the quests and grab the Flightpath. Head out of town and talk to Kalaran Windblade(2) and accept "The Flawless Flame". From Kalaran head to (3) (Following my path, which is the green line). Kill all the Heavy War Golems, Dark Iron Taskmasters, and Dark Iron Slavers in this area. When the population gets low head west to the Greater Lava Spiders(4). Once you thin that population head to each (5) and kill the Dark Iron lookouts for the 
Lookout's Spyglass.
Also kill all Blazing Elementals and all Magma Elementals for 
Hearts of Flame. Once you have the Lookouts Spyglass ignore the towers. And once you've killed all 20 Spiders Ignore the spiders.
Once you're done everything but the Dark Iron Taskmasters and the Dark Iron Slavers, head to (6) and kill the Dark Iron Steamsmiths for a 
Smithing Tuyere. Once you get the Smithing Tuyere Complete "The Flawless Flame" NOW if you're not already done it. Turn it in and accept the followup "Forging the Shaft".
Now jump down to the ledge right at the Number (7) on the map. Head inside and go straight over the bridge. You'll come to a room with Slavers and Taskmasters all over it. Kill them to finish "Job Opportunity: Culling the Competition". Also branching off that room to the west is Overseer Maltorius for "Wanted: Overseer Maltorius" and the 
Fiery Flux plans for "What the Flux?". Kill Overseer Maltorius, and grab the plans behind him. Finish killing the Taskmasters and Slavers for your quest, and by this time you should of gotten a 
Grimsilt Outhouse Key. (Check your Keyring)
Go back to the entrance of the cave, (Where you landed when you jumped down) If you're looking towards the Taskmasters/Slavers At the START of the bridge you'll see a ledge, fall down onto it then head NORTHEAST to the Incendosaurs. Kill 20 of these and then head back the way we came out of the tunnel system they got goin here. Once you're outside mount up and head to the Outhouse(8). Turn in your key and accept the followup "Caught!" when he magically ports back to the porta potty.
Kill the Geologists in this area then return to the Outhouse. Turn in your quest, and ignore the ledger he slides out. Make sure you completed "Forging the Shaft" in this area, it should be no problem. Then head back to Kalaran Windblade and turn in your quest. Accept the followup and head north into Thorium Point. Turn in all of your quests, then head out of town to the West, to "The Flame's Casing"(9). Kill the Twilight mobs in this area until you recieve a 
Symbol of Ragnaros. Return to Kalaran and turn your symbol in. Do all the miniquests he gives. Then accept "Set Them Ablaze!" Go to each tower (They're all marked with a (5) ) and equip the 
Torch of Retribution and right click the little Kindle pot on each tower. Return to Kalaran and turn in your quest. Watch the scene and take the quest from the chest, and re-turn it in. Once you're done head back to Thorium Point, and fly to Tarren Mill.