Before I got a Sakura I always used opal in Cherry Road. I nearly always won, and it always raced against Other Epics/Gem dragons. I did try other Epics. gold ( my first epic) was slow. I don't remember the others I used but I still give it a try now and again. It is a good way to see what a new dragon looks like early as they nearly always show up on the racetrack as soon as they are available.