Please hang on to that bluefire!!! I've been trying for almost a month to save enough gems from the colosseum every day to try to collect 100 gems to buy the bluefire. I would love to share dragons/gems with you...if the devs allow that in the update! (And the darn colosseum is onto me...I rarely get 5 gems from it anymore.
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I tried all the combinations suggested in this forum. The only rare I have acquired is the rainbow by following your gene theory.
So...thank you again for that! My rainbow is now a Level 10 and I'm still so excited!! I have several friends but only one of them gifts me daily. So- it's taking forever to get to the 100 gems! Maybe if I'm lucky, I'll get a bluefire before I get to the 100 gems. I can only keep trying...