To expand further than just the Divine Lance / official Deity issue.
Can a sorcerer with Demonic Bloodline cast Heal, or are they locked into using negative energy, Harm. As a Cleric whether you wield positive or negative energy is determined by your Deity choice during creation. Another option is that they are so fluid in there uses of their blooded magic that they could use both positive and negative energies. And be totally outside the constraints of religious views.
