My top L 15 fighters are : Glasswing, Rainbow Sentinel, Diamond, Chakra, Air, Prime Eternal, Playful
then Neo Air 14, Infinity 12, Valiant 12, Neo Fire 10, Black Knight 12
Achilles, Soccer and Passion have not done much so far but they are a lower levels.
Rainbow Sentinel is a good back up to Glasswing.
Dragon Story - Iceland, Fantasy Forest Story - Saint Mary