does it matter

does a players donation effect the number of times they can fight in the A wars and can a player donate what they want or does the alliance tower dictate the amount   

Answer to the first question: No. The second question: Player’s alliance tower dictates how much player can donate (free donation). Additional 750 gems donation or real money donation is a fixed amount + whatever tax bonus your alliance has. Players (soldiers) can also prolong boosts using gems.

thanks for that