Jin Elina

Whoop! Whoop! Team-Wipe Goddess is here!!
Jin Elina's skills are disastrous to the enemy team and she deals fantastic damage even at Mythic. If you fantasy her... god protect the enemies. 
*Flame Zone, if it crits, can nearly wipe the enemy team by itself if Elina is well-equipped and fantasy. The stacking damage may look nice, but it's kind-of meh.
*Her main skill can't burst an enemy to death, but it still deals decent damage over time (150% total).
*Every 3 attacks, she basically does 252% damage to all enemies over 4 seconds. This is where a huge chunk of her damage comes from, and why she should be equipped with ASPD gear.
*Finally, she gains a 50% MATK buff at 45 seconds time. This won't stack with other buffs, but it's still 25% more than the best MATK buffs known to man.