Time is also a useful currency for Healing (as you don't get to Physicker in the middle of combat).
https://www.hcobb.com/tft/new_spells.html#Spells
"Heal(S) Prerequisites: Physicker or Vet or equivalent talents (depending on the subject). The wizard pays 5 fatigue then spends one minute (12 turns) in casting while in physical contact (hands or staff) with the still living target. During and after a successful casting the target suffers no further damage from blood loss. At the end of the minute the wizard rolls and on a success the target recovers one hit of damage. Each subject can only benefit from the result of the Heal or Greater Heal spell cast in the past 24 hours with the greatest absolute value. I.e. a roll of 3 on a heal spell would heal 3 hits and also negate the 3 hits inflicted on the target by a previous roll of 18 on a Heal spell within the last day, but a roll of 4 at that time would have no effect. This spell doesn't regrow missing parts. See the Regeneration spell on page 30 for that. If the first casting in a day is after a Revival spell it will hopefully raise ST from zero to one."