Oh yeah, on the newest progression server. Do you know which expansion will have those items? Or if the marsinger quest items are dropping yet?
Heart of the Sky is a hotzone augment. Hotzones are set to start on the progression servers when The Serpent Spine expansion releases. Here is the schedule for hot zones for progression servers. The Serpent’s Spine - Level 65 and lower level hotzones will unlock Secrets of Faydwer - Level 70 hotzones will unlock Seeds of Destruction - Level 75 hotzones will unlock House of Thule - Level 80 hotzones will unlock Veil of Alaris - Level 85 hotzones will unlock Shadow of Fear - Level 90 hotzones will unlock The Darkened Sea - Level 95 hotzones will unlock Marsinger's Glimmering Gem is actually a range item and should be available with LoY.