Summoning stones drop a random troops and so fail to give a possibility to target one specific troop (for Ascension for example). At first, I thought SS should be modified, but not a good idea, let’s keep them like that: for X jewels, you can buy a SS and drop a random troop of the corresponding color.
And so on, add a new use of these jewels: craft one troop for X (depends of the rarity) jewels of the corresponding color (or both). One issue is the UI but I already proposed one solution:
And you can see something interesting on these screenshots: “Crafting” is already there.
So why not removing the Crafting troops option from the Soulforge and put it directly in the Troops/Crafting UI?
I believe (and I could be wrong) that we have a limited choice of possible Legendaries/Mythics by week because else it will too difficult to navigate. So it could also resolve this hypothetic issue .