You are right: Liquid Courage drains the heath of 0.6% at all ranks and Willpower heals at 0.7% at rank 3. But even with Salve and Recovery, there is a lost of health.It could be something not written like « under poison effect, all regeneration is reduced by 30% ». I remember a couple of years ago, when Coagulate and Suture acted on Double Edge. And there was a silent change to apply them only on enemy bleed (to counter a bit Deep Wounds). The old text did not mention this restriction.Here, maybe a side effect on one or several masteries... or another silent change.So the answer from a moderator would be greatly appreciated.