I do not have one yet on either island. Not to worried about it . There are 61 dragons to breed an grow to epic. Plus lots of land to clear. I got plenty of time.
I breed 3 diamonds, but yes i bought gold to speed up breeding, i don't like to buy dragons, i like to breed them....and because i have no patience, i need speed up process....
i try breed island and firestorm 1 months and i don't have diamond . May be i need more lucky