I don't have much experience / luck with blood, but it does seem that a blood fountain would be a
bad idea, if you mean to have it blood hunting in the capitol. You really don't want to muck up your capitol, with any nation. If you take it simply to cast high-blood spells, that's different, but out of my expertise.
Unrest : The free maenads for default Pangaea are pretty decent in my opinion - just make sure to recruit enough Pans to generate lots. One very nice thing is that they generate even while you're away from your fortresses, meaning that you can get reinforcements as you go along.
High Production : depends on your plans. I've played most Carrion Woods, where I try to get the bloody cowardly satyrs killed off so I don't have to pay upkeep. This gives me a very low impression of the satyrs, because of their atrocious morale. Hoplites and the minotaurs are better, but ... Better in my opinion to go high unrest (3), 0 (or max 1) Sloth, just so you can build -some- of the heavier units.
That or take a high admin fortress (30+) to compensate somewhat.
Again - most of my experience though is Carrion Woods, or trying more for summoned armies (vine men / ogres, kitharonic lions, etc) because of my dim view of Pangaea's home brewed troops.
Thus, I also don't have much experience with blessings for them.
Hope this helped a bit.
