Heroic allies and antagonists are built the same way as heroic player characters.
Challenge Rating: A heroic supporting character has a
Challenge Rating equal to his or her character level.
Hit Points: Heroic supporting characters gain maximum
hit points at 1st level, just as heroic player characters do.
Action Points: Heroic supporting characters gain
action points. However, few of them have the maximum number of
action points for their level (because they will have spent some of them). Assume that a heroic supporting character has a number of
action points remaining equal to one-half his or her class level.
Class Features: Heroic supporting characters gain all the
class features (talents and bonus
feats) available to the six basic heroic classes.
Access to Advanced Classes: Supporting characters with levels in one or more heroic basic classes can take levels in an
advanced class, provided they meet the prerequisites for that class.