its 3 parts to upgrade a lvl15/25/35 piece... the final piece looks like the purple robe in aemora's sig, but each other 3 peices are armors themselves (and some are actually pretty decent for those level ranges)
For a fully upgraded Lv75 item from Salvage, you require 5 things.
- a Lv15 item from Salvage (These drop off of Family mobs, or 100% NMs) - a Lv25 item from Salvage (These drop off of area Bosses) - a Lv35 item from Salvage (These are rare drops off of NMs, often requiring certain conditions to be met first) - 10 Gold Imperial Coins - 12 Synthable items, varying on the Equip that you are going for.
You just have to marry the set items with the route, and you have an upgraded item. So for Ares Head/Body, Skadi Feet, Usukane Legs, Marduk Hands, Morrigan Head/Body, you need to take the Lv15 Silversea~ route, and all items drop in those respected zones.
Where shit drops is the easy bit. It's getting it to drop. :/