Nymphs make sense, but not including them is understandable for newbie friendliness
Crusader doesn't itself give healing. Otherwise arguments can be made for NT on amethyst/obsidian pillars, or fate egg into minor vampire, or mutation into minor vampire with mitosis, or mitosis on minor vampire, or any creature could have liquid shadow cast on it
SoSa could be added to list since antimatter counts. With all this healing, including purify, doesn't seem it'd be too strong metawise