I cannot recommend healing books for you, but I can give some thoughts on healing books for you though not everything may necessarily be at an advanced level nor "ancient spells".
1. "Initiation into Hermetics" - Not a healing book per se, but the exercises on vital energy are a good starting point for practices on bio-energy / bio-magnetic healing, which are themselves historical practices if you consider their relationship with qui-gong. Good as a starting point even though the vital energy practices are not exactly spells, but they are useful for healing if used in that way. The guidance from Bardon is priceless for advanced and beginners alike.
2. "Magical Healing" - This book by Josephine McCarthy is pretty good even though it is not "ancient". It does contain visionary imagination based spells / magick that can be used for healing in addition to great theory and other exercises that can probably find some relationship to spiritual alchemy if applied enough in that direction.
3. "Healing with form, light, and energy" - This book by Rinpoche Wangyal is a good one for Tibetan elemental healing practices. It contains a great set of exercises and even a few magical spirit based practices on elemental energy retrieval, which are similar to soul retrieval. Healing here is seen from the perspective of elemental energy balances within your spirit and using the tantric and shamanic practices to bring those into balance and heal. Also quite good if you combine this knowledge with spiritual / inner alchemy.
These are my recommendations. For potions and similar stuff, you might also consider books on Ayurveda, which contains an eastern medicine / energetics perspective on healing practices. It is quite high level and I am sure the knowledge / practices in that discipline might come close to what you are looking for, if you consider potions and such to be similar to herbal medicines and their spiritual-energetic properties.
