If you want eight stars, first of all, make sure the secondary cards are all good ones~ (flame 200 or above)

Then I usually use a six-star card and a five-star card plus a second-level four Leaf grass to strengthen. But if you want to strengthen 8 for the first time, you can use 655+3, and then pay attention to the announcement. If the above just released the news that a certain person has been strengthened successfully, don't be busy strengthening it. Then I wrote some bugs in the forum. Although I felt it was useless, I felt relieved. Finally, it is best to reserve a six-star card in case you really fail, and you can strengthen it back.

It’s still very distressing if the card is downgraded after playing Gourmet for a short time...