you'd probably have about 2d10% of the healing factor, 2d8-2d10% of the toughness
...your numbers don't appear to have any feats attached to them. In this post I gave specific examples of the powers in action to give an idea of how effective I imagined them to be. I'm not really sure what it means to have "10% toughness."
You'd have about 10% the increase in toughness over a normal human being which the super had. Quantifying powers can be hard, but I'll try. For other powers, it could also mean the power doesn't work or doesn't work right 90% of the time.
if you have the Super Strength of Redthunder, who is as strong as four and a half men, at 10%,
you could have 1/10 Strength, making you about a third stronger.
I don't understand your math. How does 10% equate to 1/3 stronger? Stronger than whom? 1/3 stronger than Lucy's baseline of "average strength of a typical 110 pound girl" or 1/3 stronger than "the average man?" Or do you mean 10% of Redthunder's strength, which is 10% of 4.5men, which is .45men?
4.5 strength is +350%. 10% of 350% is 35%, which is about 33.33...%.
How does stacking work? If we consume 1 unit of blood from Tom who is twice as strong as the average man, and 1 unit of blood from George who is five times as strong as the average man, what is the result?
Assuming the unit is about 10% of the power, that would be (0.1*+100%)+(0.1*+400%), or half again as strong as normal. If you drank enough to absorb the full amount of power of both, you'd be six times as strong as a normal person. This is, of course, assuming a fairly inconsequential amount of impact from environmental factors past the powers.
How do caps work? Let's say Alice and Bob are both as strong as ten men. And we consume blood from Alice until we reach 100%. I presume we're now as strong as ten men. Next we consume blood from Bob until we reach 100%. Are we now as strong as 20 men, or only as strong as ten? What if we continue consuming blood from Alice after reaching 100%? Can we become stronger than Alice?
You'd actually be as strong as 18 men, assuming the powers didn't come from essentially the same source. If two supers are about identical in powers and origin, it only counts once. Typically, this will only be applicable in cases like "manufactured" supers or priests gaining general powers or whatever--it won't come up normally. If you only get super strength from Alice, you're capped at her strength (100% of her power)
This could get complicated if you're tracking percentages based on the powers of those we leech rather than against some baseline. For example, if we consume once each from Tom, George, Alice and Bob in the above examples, will that be listed on the character sheet like this:
Strength:
8% of Tom (two men)
6% of George (five men)
5% of Alice (ten men)
11% of Bob (ten men)
Or will it be listed like this:
Strength:
N%
The second would be simpler, but I don't see how that kind of descriptor would work with the system you appear to be describing.
The hardest part will be the math, but I'm fairly good at it and simplifying it. Besides, there's a huge variety of super powers...
get back to me on the strength
Of the three it's the only incident with repeated contact. The hand-blood-sucking and bloodied-hug incidents were single contact, whereas the strength probably involved various "fluid exchanges" regularly for a couple weeks. It would probably be the highest percentage value of the three.
Yeah. Guessing how many contacts and such would be the tough bit there.
I hope this makes "sense."