I think Elder Parasite should be reworked so that instead of making the wearer more sensitive to damage by 30%, for the duration of the buff they should lose 30% of their maximum health. That, I think, would be a more clear deterrent for noob players who think that the item is good on paper heroes.
Sure, but you got the numbers wrong. 30% extra damage taken does not equate to 30% less health.
They would actually lose 23% of their max HP. (1/1.3)