Finally got my diamond dragon---------- at level 99!!! Lol!
My combo (after so many tries) -------- winter (level 7) + lightning (level 10)
Got my Stone Dragon after that!
Combo ---- fairy (level 10) + light (level 10)
I stopped combining fire with other elements.... Seems team lava's office is burning that they always give away firestorm! Lol!