If you do intend for a shared health pool, I would advise some prevention against villages which do not provide much information. I had an early village of:
Lover (1 adjacent evil) / Enlightened (nearest evil counterclockwise) / Medium (#4 is real) / Gemcrafter (#3 is Good) / Confessor (I am Good) / Enlightened (nearest evil clockwise),
which has a 50/50 chance of losing health no matter how good of a logician you are.