Blood in particular would be of possible use as a
conduit of ki, or perhaps a battery, but as a consumable power source? This is basically what Tien's Kikoho or a self-destruction attack already does. Localizing the damage to the blood would have some possible use in that the body would be spared, but it would force exsanguination with alarming speed; an animal like even an adult saiyan won't even have two full gallons of blood to burn, and they'll start passing out well before then.
Welcome aboard!
Broadly. I haven't the faintest idea what vacuum energy is, but the "three in one" aspect of genki, yuki, and shoki, I'm aboard with. All the other technobabble that the author put in there seems honestly quite irrelevant, so take it if you like, leave it if you don't.
Regarding Tien's stuff or self-destruction attacks: if BOD is correct and ki is a force that living beings channel, then the techniques work by overcharging the body's ability to channel at the cost of bodily harm. If it's produced by the body, then they're either overcharging production or consuming themselves for power. It doesn't matter to me. Either way, ouchie=power.
Good news, then!
As a more general note: BOD has at last updated, but the author has not responded to my request for a dialogue on later power level mechanics. I assume there isn't going to be one. Nathaniel and I have long since devised our own system anyway given that I spent months waiting and we needed something, so as a general heads-up,
this quest's handling of power levels, for everything north of the initial SSJ2 transformation, is no longer BOD-compliant. We still have a system all worked out, just be aware that the figures you see may eventually diverge from BOD's canon.