PC on various Gold & Purple Items

Due to the fact that I'm working from a Mac, I can't seem to put my screen shot compendium into this message, so I'll type the information out.

1. Inscribed Chakram (purple)
Energy +10 (req 8 Domination Magic)
Armor +4
Energy -5 (don't understand this, if it's energy +10, how is -5 too?)

2. Stone Summit Shield (purple)
Armor 16 (req 13 Tactics--ouch way high)
Health #13 (while in a stance)
Quick recovery from Disease

3. Composite Bow of Enchanting (purple
Piercing Dmg: 15-28 (req 9 Marks)
Damage +11% (while health is below 50%)
Enchantments last 13% longer

4. Earth Wand (gold)
Earth Dmg: 11-22 (req 8 Earth Magic)
Energy +4 (while health is below 50%)

Thanks!