I'd have to agree that you really shouldn't tie this into being a Conjurer. Instead, as others noted, your character could be especially keenly affected by Aether-sickness; is prone to illness generally; or has a congenital defect that manifests the same way (a heart condition, perhaps?). If you wanted to tie any of these back to your character's use of magic, a degree of focused will is seemingly required to use any of the three forms of Aether channeling, and we know via mechanics that you do eventually run out of some sort of resource when using magic. So you could say, for instance, that your character's weak heart means that channelling Aether quickly exhausts her, essentially playing MP as a measure of endurance.
EDIT: If you want to play someone who, metaphysically, uses their own Aether to heal others while also using magic "correctly," you probably want to go with arcanima (or Succor, but that's an extremely contentious choice in the RP community due to varying interpretations of the lore and setting).
EDIT: If you want to play someone who, metaphysically, uses their own Aether to heal others while also using magic "correctly," you probably want to go with arcanima (or Succor, but that's an extremely contentious choice in the RP community due to varying interpretations of the lore and setting).
The Freelance Wizard
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((about me | about L'yhta Mahre | L'yhta's desk | about Mysterium, the Ivory Tower: a heavy RP society of mages))
Quality RP at low, low prices!
((about me | about L'yhta Mahre | L'yhta's desk | about Mysterium, the Ivory Tower: a heavy RP society of mages))