Here is what I have on the legendary gem of many facet possibilities right now which may not be complete. I didn't actually reroll as my first 2 crafting attempts gave me a set I wanted to keep.
10 possibilities for first set bonus from VON (3) or Red Fens (7)
9 possibilities for second set bonus from Chronoscope (1) or Sands (8)
Here is a link to the sets I found when opening up the window and viewing sets:
https://docs.google.com/spreadsheets...it?usp=sharing
A few caveats
- It's possible not all set bonuses show up in alter window.
- It's possible through bad luck I never saw a set bonus
- It's possible Sands Set Bonuses are placeholders as it's a work in progress
Once I came up with this set of 19 I checked another 20 times while playing a game of root online with some friends and didn't see any new sets.
If there are no other set bonuses, that is a 1 in 10 chance to get the first set bonus and 1 in 9 chance of getting the second set bonus. 1.1% chance of getting the combination of both set bonuses you want if you are looking for 2 specific set bonuses. not as horrible as I was expecting.
If anyone has any additional information or missing sets, that would be helpful to know.