Here is my tip:

1. On double XP day use** Anger Totem** on your **gold-shiny** **bird**.

2. Finish upgrading to level 20.

3. Evolve the bird using evolution material.

4. Sell the bird.

Result: for example, a 2-star bird gives 1000 coins and 40 evolution material back.

Math.

Counting my clan's XP bonus, it takes 1 Anger Totem (250 coins) and 3 one-star birds (10 coins, 1 mat) to get a two-start gold-shiny bird (200 coins, 2 mat) to level 20, and 125 evolution material to evolve. But you might get it evolved with 1 Totem and 1 three or even two-star bird as well depending on your XP bonus.

A. If you sell all of those above separately, you'll get 480 coins and 5 mat.

B. If you evolve the bird, you'll spend 35x4 coins and 125 mat on evolution, and get back 1000 coins and 40 mat, resulting in net profit of 860 coins and loss of 75 mat.

Conclusion. It's up to you to decide if you want to spend 75 mat to earn about 860 coins, or just get 480 coins and 5 mat.

Last edited: Nov 16, 2017