the idea we based some imperial evokers around was not directly blood = compatability & better blood = higher compatability, but rather that those with more "pure" blood, if such can even be said after a thousand years, had more of that undefinable magical component that makes them interesting to the relics. Thus it can be bred, but not necessarily successfully. Magic, as everyone knows, can be fickle. The child of two with strong blood might have strong blood, but doesn't [i]have[/i] to have strong compatibility. 

As for the charisma bit, Free... We fully agree. 
We're not charismatic in that way. Throw us in the gritty lore, no problem. Make us deal with people and we're not as good.
We're willing to co-GM with many of the others here, Both Barks and Alida, wethinks would work very well. We don't know you too well, Barks, but we're sure that can be fixed.

We think you've got enough GMing to deal with as it is, thats why we're not recommending you, Sep. Its better for all your RPs to stick to GMing just a few.

you could draw on that image for roughly how you imagine that kingdom you spoke of as being shaped. We can later draw in nicer borders between nations.