Where are you looking for them? First, do they show up in your rune checklist? Second, in rune manager what filters are you using to try and find them? Did you set the filter to ST for faction and legendary for rarity?
I have tried many different ways I should have 2x doomies and 2 x st angel I only still have the ones I started with
Try checking one more time we looked into this some. Just go to the Rune Checklist and type in Angel or Doombringer into the filter and they should show up.