[atul]

A couple of points...

The immortality aspect of your vamps has one downside - lose your capital and then you're left with only sub-par troops (as vampires without their immortality are hardly anything to write home about in late stages of the game).

The assumption of game being turn 100. How big a map you're thinking of? I'd think most games would be by far been resolved by that time. Also, you shouldn't dismiss Undead Mastery as a too lategame spell, currently I'm in a MP where turns are in the 50s and my research is around levels 8-9 in all circles bar blood. Granted, I do value research much... and also, by that time players have had a good time to forge crystal and slave matrixes so with communion you can get a lot of Undead Mastery squads even if you aren't Pythium.

If you push the dominion with lots of priests blood sacrificing, they can be dealt with all those nice far-slaying spells.

And remember, when you invest into blood, other players may do the same or work their way into other schools. For example, the nation to get the Chalice has an option to Tartarian Factory, producing easily 50 SCs by the turn 100 you specified. And unlike vamps, they aren't limited by dominion. And of course, elemental royalty is usually the first to be reserved.

Anyway, I'd be a bit sceptic about that turn 100, but of course it depends on your map and people you play against.

There's probably a lot more to be considered, but that's what I came up with...