how are damages from overheal from hecate with death howl amulet dealt to opponents?

[R210496643]

if my party have 3 people and my opponent have 6 people, hecate with death howl heals a total of 120 points from each of us. does each people of the opponent team get 20 points (120 ÷ 6) damage from overheal or 120 points damage from overheal?

[Alkaris]

Damage is dealt starting from Death Howl inscription lvl5, its dealt in % amount of overheal, depending on inscription level and is dealt to all enemies.