I rather give an fast tutorial instead of letting you donate. Surely the server will appreciate the donation but from rebirth 0 to 1000 is just insane.
Patience will be your best friend when it comes to rebirths.
Let's say you'd donate eggs. From rebirth*
* 0 - 350 = ~2450 Eggs.
* 350 - 450 = ~ 1700 Eggs
* 450 - 600 = ~ 4800 Eggs.
* And it keep increasing.
I have to admit that I'm not 100% sure about the exp stages. But I do know that you'll need 7 Eggs for 1 rebirth in the first stage. Next stage you'll need ~17 Eggs and the 3rd stage is 32-33 eggs. And it will always increase.
Even though the level stage doesnt increase all the time, it's still another stage with the exp eggs.
My tip to you is to only donate for exp ring. Atleast in the low rebirths, and then focus on eggs if you're lazy.