Workshop

Regarding Blood Harvest: it also applies to the Blood Mage; he has his own intentions, and everything revolves around him.
Regarding the Temple: it's not a certainty; there's a limit of two Neutral Buildings, so it depends on them what to choose:
defense, status, or resurrection. Moreover, if they also heal their own units, they won't use their Neutral Buildings (in an unfavorable situation). However, they can also turn them against enemies as a block.