Each point of Wrath spent heals the Crusader for 1341 Life.
Heal amount is increased by 1% of the Health Globe Healing Bonus.
Wrathful is a passive Crusader skill, unlocked at level 30.
The amount of extra Life per Wrath spent scales with level, up to 1341 at level 70. The percentage of Health Globe bonus is added to healing per point of Wrath, not to the total healing per cast.