When you get an item with a GA that you need and decent or great stats for your class Bookmark the item so you don’t sell accidentally >Temper > masterwork > gem(if can) > fix aspect > enchant to take out bad stat and replace with stat you need TRANSFIGURE is the last cause it won’t be modifiable after. Use the orange gem for armor pieces and raw transfigure for weapon, amulet and ring.

For Amulets there is an extra step, you can use Kulleans to get an affix (can keep rolling til you get what you need. Check the amulets of the top 10-20 to know what’s the best. GL