Okay, if you've been collecting long enough, you have a Heirophant.
Thing is, at 145 points, it's usually a Very Bad Idea to use it in an army of
200 points.  Personally, I'd normally never use it in an army smaller than
400 points.  So, what use is the Heirophant, other than looking pretty and
gathering dust?
     Here's a special "scenario" idea to let you get some play out of your
two-headed terror.

     For all that they're shunned by other Draconum, Heirophants have a
complex social structure among themselves, which often results in squabbles
over pecking order.  The average Heirophant may only meet one or two others
of his breed over the course of a year, but it's almost guaranteed that one
of those encounters will result in a fight for pecking order.
     By tradition, such fights involve only the Heirophants themselves and a
small personal bodyguard, so as to keep social position among the
non-dragonkin from having an impact on the fight (being in command of a huge
army of humans and elves does not really impress other Heirophants).  The
fights are also not to the death...at least for the Heirophants.  Rather, as
soon as one Heirophant is too injured to fly, he yields.  Sometimes a
Heirophant dies in the process, but that is not the intention.  In fact,
slaying an opposing Heirophant can cause a lack of status, as it implies you
cannot control yourself or your forces. 

     RULES: Each army consists of a Heirophant and up to 55 points of other
figures, representing the Heirophant's personal retinue.  This may include
uniques, such as a Neophant.  No capture attempts may be made against
Heirophants, this is a dominance struggle.  Nor may any Healing be used on
either Heirophant, but it may be used on other members of the retinue.
     The winner is the first to damage the opposing Heirophant badly enough
that the Flight ability is lost.  If a time limit is used, the winner is the
one with the least damaged Heirophant, breaking ties by counting points
according to the regular Mage Knight rules.
     If some mad fool wants to start a Heirophant League, then players keep
track of status using a points scale:

     +1 for a victory
     +2 if your Heirophant has taken 2 or less ranks of damage in the victory
(not cumulative)
     +0 for a victory in which the opponent dies
     -1 for a loss
     -1 if your entire retinue dies, regardless of whether you win or lose
(this is cumulative), since this indicates you're a poor leader.