Oh we're listing leaders? Okay, other potential leaders I have are Gigas (for zombie teams), Fire Starter (for x2 fire atk, not ultimate evo'd yet), Water Starter (for x2 water atk, also not ultimate) and Uriel (for x2 fire HP, not evo'd yet). I also have Wood, Fire, Water resist leads but I don't really use them.
arg lost to Vespa cave's final dungeon final boss because I wasted RK's skill like an idiot