Go with different heroes and always take advantage of the heroes passive.
Rafaela
Passive: Rafaela penalizes the target who has killed her and deals Damage.
First Skill: Rafaela uses the power of Holy Light to deal Damage to three nearest enemies.
Second Skill: Rafaela summons Holy Light to regenerate HP for herself and the most-injured ally.
Ultimate: Rafaela uses the power of Holy Light to punish enemies in front of her, dealing Damage and stunning them.