Bash'ir Landing raid

Once every two hours, a group of Skyguard will launch an attack from the Sha'tari Skyguard base at Ogri'la to Bash'ir Landing. The remaining time for the attack can be determined by talking to the Aether-tech NPC at the landing pad in the quest Assault on Bash'ir Landing!. Once the attack is underway, several Skyguard NPCs will engage the mobs at Bash'ir landing, and a series of NPC vendors will appear. The items provided by the vendors increase in quality as the attack is maintained, until eventually the entire area is wiped out by a large number of elite attackers.

Stage 1
Assault begins:
 * yell

Stage 1 complete:
 * yell

After the skyguard land a non elite flesh beast will move in to attack the NPCs at regular intervals for a minute or two. The Aether-tech Assistant appears after defeating the elite Bash'ir Flesh Fiend. A group of about 5 is recommended for this phase. These flasks only work in Blade's Edge and Gruul's Lair. Like all flasks they last 2 hours (Changed to 1 hour in Patch 3.1.0) and the effects persist through death.

Stage 2
The Aether-tech Adept appears after defeating 3 Elite Disruptor Towers. The disruptor towers launch AoEs at the NPCs and players; a large group (raid of 25) is recommended to clear this one, but it may be possible to get the gems with a smaller group, if you buy quickly and then wipe. It has been completed at level 70 with as little as 3 people (Rogue, Tank Druid and Holy Priest), however, this amount is not recommended.

Stage 3
The final wave appears shortly after the siege towers have been destroyed and contains a powerful boss mob called The Grand Collector that splits into three at some point during the fight and has some very nasty AoE spells. The Aether-tech Master appears upon completion of the event. The Master sells Meta Gems, Geodes and Accelerator Modules:

The Metamorphosis Geodes can be "opened" like lockboxes and most likely contain a armor piece.

Accelerator Modules
These can be used on the small rods that stick up from the ground near the long tunnels of rings on Bash'ir Landing. These are rather buggy at the moment, so be sure that no mobs are in the tunnel, or about to enter the tunnel when you use the controls or the summoned boss could bug and despawn. Summoned harbingers drop an Apexis Crystal (item) and a couple of boe items, easily five-mannable. Watch out for their spell reflect though.