Priestly Help
I recently hit 85 with my first toon a belf disc priest whom I love love love. I've never had any issue healing with her...until it was heroic time. I don't know what I'm doing wrong, but it seems like A) I'm oom before any boss fight is half over, and B) the rare occasion I don't run out of mana I get threat over and over and over. I fade and the mob runs back to tank and runs right back to me. It doesn't matter what kind of tank I have either. What am I doing wrong? Thanks in advance!