You guys forget that it is hardcoded in HB that the toon should engage enemies, rather than follow allies when in healing specc/CC.
Check this link: http://www.thebuddyforum.com/support-issues/27103-bg-issue-healer.html
We need a new bot that overrides HB's urge to engage enemies and follow allies instead.
Looks extremely stupid to engage in combat when there is no allies around to heal when useing a healer class.