User blog comment:Smaugtastic/Secrets to Dragon Story/Tourney Battle Plan/@comment-25462635-20160426202107/@comment-26035215-20160428134605

I get what you mean. Right now, I have a level 15 Dueler and 1 level 15 Diamond and Infinity respectively. A level 15 champion works wonders, but a level 13 one is already good enough imo. SO i guess there isn't too much pressure, but damn. Warrior Princess' feeding cost is a die-for in a champion type...

Frankly, the only real reason why I have 2 level 15 Diamond types is Tourny and Prime breeding. If there so happen to be boosted breeding weekend, I tend to spend 100gold, make use of the level 15 diamonds, and make one of the breeding roosts dedicated for trying Prime/Diamond hybrids.