I feel like I've tried every combination for the second Elven potion. Is it physically possible to craft it currently?
Yes
I think the blanks are grinding platinum; the mystery element is copper. You heat it twice and stir it, I think. I could be wrong
It should be
1. Grind Platinum
2. Add Platinum
3. Heat Platinum
4. Grind Copper
5. Dissolve Copper
6. Add Copper
7. Add Gold
8. Stir Solution
9. Heat Solution
10. Heat Solution
11. Stir Solution