Map of Ogril'la, Skyguard is just north of it.
If you have not done any quests for Ogril'la and reached neutral with them, you have to start at Grok in Lower City in Shatt.
Grok will give you the quest: Mog'dorg the Wizened which will take you into Blade's Edge.
Shiny question mark shows Mog'dorg.
Turn in the quest to Mog'dorg the Wizened. You do not have to complete any other quests with him. Head on over to Ogril'la. They'll talk to you now.
Talk to Chu'a'lor. He'll give you the quest: The Crystals.
After speaking to Chu'a'lor you will be neutral with Ogril'la.
Where the apexis shards can be found. They drop from most of the creatures.
Apexis Flayers have the highest drop rate for the Apexis shards and they are right outside of town.
Apexis Shards
Chu'a'lor will give you the quest: An Apexis Relic. Make sure you take a extra shard in case you mess up the sequence. It's kinda like Simon Says.
I don't know if the Torkus quests are required. I went ahead and did them. You can check and see if Chu'a'lor goes ahead and sends you to see the Skyguard Commander which is the ultimate goal. If not complete the quests below. Or just go ahead and start the bombing quests with the Skyguard if it will let you.
Torkus will send you on a quest before this one, I believe. I didn't screenshot it, so I don't remember. Anyways, it's a quest to get a flask. Then it's the quest: Our Boy Wants to Be a Skyguard Ranger.
Fel Crytalforge where you make the unstable flask of the beast.
Turn in to Torkus.
Pick up the quest: A Father's Duty from Torkus.
Bash'ir Crystalforge where you make the unstable flask of the sorcerer.
Chu'a'lor will give you the quest: The Skyguard Command. Right up from Ogril'la. Turn into Sky Commander Keller.
Return to Sky Sergant Vanderlip and she will give you the quest: Bomb Them Again.
Now it's reindeer time. Use your preserved holly. Go bombing again....
Merrymaker Title