Breeding for Profit

Breeding Profits Table
Note: Per hour calculations presumes there is always a couple breeding a new egg and an egg in the nursery at all times.

The best dragon to breed for XP is the Seaweed Dragon, though there is no guaranteed combination as the Swamp Dragon is also a Plant/Water combo, the best with a guaranteed combination is the Blazing Dragon which is tied with Sonic Dragon and Willow Dragon in terms of XP, but gives more cash then those two.

For earning gold, the Air Dragon is far and away the best choice and has a relatively short breeding period.