To be more precise, he lost 15 points to basic stats, but that is still a lot.
I agree with everything else, except for the Shout in Daedra's case.

Yes, Daedra is a special case, but she seems to have it from the start. As for Education, I did miswrite, but it's still very much.

but I want to get Death Herald, after all, it's free own.

In my opinion, squads join too rarely and too randomly to be sure the skill pays off. And spending five levels on dreams, especially considering that you need to take the skill as early as possible... you'll either have to sacrifice Necromancer, magic, or education... and if they come to you earlier, that's already lethal, and 1-2 joined squads won't help here.