So far I've run The Nether solo and tested a couple of expected sources of healing so here are my findings: Full healing: Usually by giving health regen > Unrelenting > Crimson > Rat King > Suros Regime > Touch of Malice > Dawning Surprise > Heir Apparent >> Note: It's not healing but it is the only on-demand, high-damage-resist overshield that can regen itself Significant healing: Decent chunk healing > Healing Orbs > Wells of Light > Ruinous Effigy's Transmutation Sphere Draining Guard >> Note: I was surprised by how much healing this did. This can genuinely be used while invisible along with Gyrfalcon's to actually be decent Negligible healing: A blip on the health bar > Cure x2 (Heal Clip, Healing Grenade, Red Death Reformed) > Restoration (Healing Grenade) > Void Overshields (Repulsor Brace, Echo of Vigilance) >> Note: Repulsor Brace can stack and fill the health bar given enough enemies > Echo of Leeching > Facet of Blessing > Soul Drinker > Assassin's Cowl > Combination Blow No noticeable healing: > Devour > Wormhusk Crown > Better Already > Recuperation > Tommy's Matchbook (expected) > Lament I only tested what I could on Hunter, so if you have more sources please add them. For example, I do not have Buried Bloodline or a weapon with Chaos Reshaped so I couldn't test how they performed and I was solo so I couldn't check the effectiveness of Lumina or Support Frame Autos. I also left out any Aspect or Fragment that just gives a subclass verb like Restoration or Cure. I heard Knockout on Titan can fully heal tho. Edit: It would seem Datto has a similar list from his [url=https://www.youtube.com/watch?v=RVE9Wn_7kcQ&t=115s]Episode 3: Heresy Guide[/url] (@ timestamp [1:55]). Coolio, maybe he saw this post