Contribute as much as you can in Clan Evolution

You can make a daily contribution to the Clan Evolution. Once completed these evolutions give benefits and buffs to the whole clan. Both in development and combat.

You can donate resources and if you want to go the extra mile, diamonds as well. Click on the evolution to see how much you pay for each donation. You can donate a maximum of 25 times at first and after that you get another chance to donate after the countdown under the button reaches zero.
So the earlier you start to donate during the day, the more donations you can make.

You can donate a maximum of 50 times with diamonds. The amount it costs will rise with each donation, starting with 2 and ending with 100.

A trick to spend less is to donate diamonds on different evolutions that are open for contribution. Each will start at 2 and count up from there. If you spread your donations over more than one evolution, you will spend less than when you all put it into the same one.

You will earn Contribution Points, which you can spend at the Clan Store. You will also contribute towards the Alliance points, which can be used by the R4/R5 to stock the Store.

You are free to choose, but consider the recommendations

This shows you the cost in resources, the exp gain for the evolution
and your reward in contribution points.
When the countdown reaches zero you get another chance to contribute.

This evoltion costs less resources, but also gives less contribution points.