The RAW: "A destroyed homunculus companion can be restored to life by performing a ritual with its corpse that requires 1 pint of its creator's blood per Hit Die of the homunculus and rare materials worth 100 gp per Hit Die of the homunculus."
This strikes me as very strange. The Promethean Alchemist gains a companion which, if replaced, costs them blood. There's no rules for what the blood loss does to the alchemist, yet it starts leading to absurdity.
At level 5, that's 4 pints of blood, enough to throw the alchemist into dangerous shock (assuming human or human-like physiology). By level 8, it's not a survivable amount of blood loss. By level 15, it's more blood than is in a human body.
For reference, a human adult has about 5 liters of blood volume, takes a 4-6 weeks to replace the lost cells per pint of blood lost, and suffers severe tissue injury with a strong chance of mortality after losing 2 liters of blood. One pint is very close to 1/2 a liter. Square-cube law says a halfling or gnome should have about 1/8th that.
So...the point of all this is that this rule seems silly. I also don't want to have the black comedy of the party continually healing the 10th level alchemist as he sits all night over a basin cutting his vessels open and bleeding into a bowl.
Proposed Re-Write: "A destroyed homunculus companion can be restored to life by performing a ritual with its corpse that requires 1 pint of its creator's blood and rare materials worth 100 gp per Hit Die of the homunculus. Conducting this ritual deals two points of Constitution damage to the alchemist and takes eight hours to complete."
Thoughts?
1 pint is a reasonable catch-all, but perhaps for the sake of flavor you could say that the ritual imposes a -2 penalty your Constitution score, with an additional -1 per four Hit Dice. This penalty is reduced by 1 point per day until it is gone. Or call it drain and have it go away at the same rate. Perhaps calling it ability damage would be easier, but that is easily healed. Alternately, you could say that the character is fatigued for 1 day. At higher level he is exhausted for 1 day and then fatigued for 1 day.