On live many (but not all) of the quest reward items in Plane of Sky underwent an upgrade after Kunark was released. This upgrade was implemented on Project 1999 in a patch on 7/24/2011.
Since then it has become impossible to get the old versions of these items; all of their quests now return the new versions. If you have an old version of an item you can upgrade it to the newer version by talking to the same NPC you obtained the old version from.
The main Plane of Sky page now only lists the new rewards, but this page continues to list the old ones for posterity. This page also includes the newer version of each item, when one exists, in parentheses after the old reward.
Quest mobs have a 3 hour respawn time.
= Quests by Class =
Note: Most quests requires three items. The first is typically a common drop, the second is an uncommon drop, and the third is a rare/boss mob drop. Some requests require a fourth Efreeti item. The islands from which they are acquired, where known, are indicated in parenthesis. .
To reach the quest room you need the free Veeshan's Key (Purchased) (not the same as the Isle 8 version), from the Key Master. It looks like a Jade. The click point is the northern dish on island one, at around .
The name of the mob in (parenthesis) to the right of your class tells you who to hail once you're inside the quest room. You will then have the option to summon the quest mob you need to do your turn in.