It is so anoying upgrade the runes.
Please, make it easier.
Set a second Digivolved Digimon option that uses 3 Material Digimon instead of one.
Base digimon = Rune of Light
1st Digivolved Digimon = Rune of Destiny (Use 1 Material Digimon = 1 Rune of Light)
2nd Digivolved Digimon = Rune of Miracles (Use 3 Material Digimon = 3 Rune of Light)
It can be done easily to 8 stars Rune! So we can evolve them twice faster!!!