Talk:Epic Breeding Sanctuary/@comment-119.224.101.234-20120821190846/@comment-5085186-20120821192032

Here are some things to consider:

-The cave is cheaper, so you can save gems for other things

-The Island (pre upgrade, not changed in upgrading) slightly increases chances for Epic dragons. Since those have the longest breeding times, upgrading the island gives you a slight increase in chance while reducing the time the island is "tied up".

If I were making the decision, I would probably do the cave first and then use the "saved" gems as the base for building up enough gems to upgrade the island.