I'm in the (haha I wish) final stretch of enchanting--420->450. So here's what I will have available to me that is a skillup, in order of orange, yellow, and green:
Orange:
Boots - Superior Agility (+16 agi) 16 infinite dust, 6 greater cosmic essence
Bracers - Expertise (+15 expertise) 24 infinite dust, 4 greater cosmic essence
Bracers - Major Spirit (+18 spirit) 16 infinite dust, 12 greater cosmic essence
Chest - Greater Mana Restoration (+8 mp5) 20 infinite dust, 8 greater cosmic essence
Cloak - Major Agility (+22 agility) 18 infinite dust, 6 greater cosmic essence, 2 dream shard
Gloves - Major Agility (+20 agility) 8 greater cosmic essence, 1 abyss crystal
Shield - Defense (+20 defense rating) 10 infinite dust, 10 greater cosmic essence
Yellow:
Boots - Greater Spirit (+18 spirit) 12 infinite dust, 5 greater cosmic essence
Boots - Greater Vitality (+6 mp5/hp5) 14 infinite dust, 4 greater cosmic essence
Cloak - Superior Frost Resistance (+20 frost resist) 6 infinite dust, 3 greater cosmic essence, 1 eternal fire
Gloves - Expertise (+15 expertise) 20 infinite dust, 2 greater cosmic essence
Gloves - Precision (+20 hit rating) 15 infinite dust, 5 greater cosmic essence
Weapon - Exceptional Agility (+26 agility) 12 infinite dust, 6 greater cosmic essence, 2 dream shard, 1 eternal air
Weapon - Exceptional Spirit (+45 spirit) 30 infinite dust, 2 dream shard
Green:
Bracers - Greater Spellpower (+23 spellpower) 8 infinite dust, 4 greater cosmic essence
Bracers - Greater Stats (+6 all stats) 16 infinite dust, 3 greater cosmic essence
Chest - Greater Defense (+22 defense) 10 infinite dust, 1 eternal earth
Chest - Mighty Health (+200 health) 3 greater cosmic essence
Cloak - Superior Agility (+16 agility) 9 infinite dust
Gloves - Greater Assault (+35 attack power) 6 infinite dust, 1 greater cosmic essence
Shield - Greater Intellect (+25 intellect) 12 infinite dust
Weapon - Exceptional Spellpower (+50 spellpower) 10 infinite dust, 2 greater cosmic essence
And that's the list. I have a stash of dusts, essences, and dream shards stockpiled away--but not as much dust as I need. Armor generally gives dusts (75/25 ratio) and weapons generally give essences (again, 75/25 ratio). Blue items are more likely to give dream shards (small or regular) and only epic pieces give abyss crystals. Donations of greens to dust are greatly appreciated, naturally.