New(?) hemospectrum headcanon:
Highbloods are more physically powerful bc they are more closely related to seadwellers, who are the “OG” troll race. As we’ve seen w them, they live in very harsh conditions, so of course they’ve had to make up for it somehow; thus we see the increased physical strength and durability. The further down on the hemospectrum you go, the more distant the troll is from their seadweller ancestors. Being that they have been on land for many centuries, it would make sense that the low blooded trolls would be very common seeing as it would be more unusual for land dwellers to have a closer relation to seadwellers.
Jadebloods may be as rare as they are due to them technically being a third, newer race of trolls ( rainbow drinkers ), which has led to the highbloods keeping their population in check for fear of what abilities they may have or even develop over time.
This theory will need more fleshing out, but hopefully the rough idea makes sense.

















