Thanks for your feedback!
Well, there isn't too much strategy behind it all. Distributing more points to the characters that come in later yields more, cause they have a higher base value. And the base value of all characters is raised by the highest animation level reached overall. That's pretty much all there is to it.
The real point though is just to watch the animations and the story unfold. And I agree, the game is a bit on the weird side :)