If you are looking for the Soulsprout plant or the soul motes that it produces, this is the best area that I have found for those.

The area is called Rattlevine Ridge and it’s going to be in the First Light district. This is not an easy area. There are a lot of enemies in the 24-25 level threat range. I can usually find 7 to 8 Soulsprout plants and have roughly 80 soul motes in my inventory thru the first run.

If you are high enough in mining, there are 3 star metal nodes right where my avatar arrow is at. You do have to climb on some rocks behind the last house where the boss is at to find it.