It wasn't my challenge lpisko. Rather, I was challenged to beat the game on insane/insane. I just chose to use a stupidly OP faction to do it, that's all. I may have to try insane/insane again some other time, without beastmaster and using 1 of the default factions, just to see the difference.
Faction/kingdom abilities carry over. 'Blood' abilities only apply to units of that race.
A summoned familiar is not Mancer, so it won't get the 'blood' ability.
Just like how your champions are often of a different race (e.g. Tarthian), and thus would only have 2 base movement rather than the 3 of the Mancers.
I think it's pretty straightforward. I wish the familiar had more than 2 movement as well, but it doesn't, so I manage with that.