The naming conventions of the terms seems pretty interesting. While potencies and tooltips are still up in the air, based on the translations so far... Sage's skill names sounds like they are based on ancient medieval physiology to determine a person's disposition and health. This system of medicine was called "Humorism" and was adopted by the ancient Greek. The idea was that these humors correlate to the state of the human body. An imbalance could result in a sign of illness and affect behavioral patterns.

The Greek Humorism revolves around the 4 humors (fluids) of the body: blood, phlegm, choler (yellow bile), and melancholy (black bile). A combination of these determines a person's Complexion or temperament.

Cardia = Refers to the heart
Haima (oGCD not shown in tooltip) = Blood in Greek, more referred to as Hemoglobin today. Used in conjunction with Cardia... means Sage is pumping blood to the heart! :O
Phlegma = One of the 4 humors of medieval physiology, thought to cause Sluggishness / apathy
Dosis = Dose.
Soteria = Greek for goddess of the spirit and safety /deliverance from harm.
Physis = Growth or change in nature.
Pneuma = Vital Spirit /soul (Lifeforce) of a person
Prognosis = outcome of a disease / ailment
Diagnosis = Identification of disease / ailment by examining symptoms
Eucrasia - Normal state of health / physical well being
Dyscrasia - Abnormal state of health / disordered bodily state

The healing gauge skills uses a suffix of -chole in their naming conventions, which is also referring to one of the 4 humors of the body.

So Sage's basically a doctor with scientific tools and keeping you healthy using ancient medieval physiology as the foundation of their aetheric treatment. XD