On topic, The 10d6 from a bolt of fire is not achievable until 15th level. The action to use bolt of fire is a standard action. A Wizard / Wilder will crank out a lot more damage per round. Especially when you add in quicken actions.
Heat Death is a fort save or die ability. Fort saves tend to be high for most monsters. The base DC is low ( heat death DC 14 vs finger of death DC 17). Another limit is the pyro must use a full round action and expend focus. In order to do this round after round requires both hustle and psionic mediation. In which case, a pyro with wilder/psy war levels can use heat death around five times before being out of power points.
For comparison, a cleric of similar level can use slay living around 12 times per day. Many of these could be heighten (much better DCs) or reached. The pyro is actually a very limited class. The class is not very good at damage dealing or instant death abilities.
-Psiblade
Heat Death is a fort save or die ability. Fort saves tend to be high for most monsters. The base DC is low ( heat death DC 14 vs finger of death DC 17). Another limit is the pyro must use a full round action and expend focus. In order to do this round after round requires both hustle and psionic mediation. In which case, a pyro with wilder/psy war levels can use heat death around five times before being out of power points.

For comparison, a cleric of similar level can use slay living around 12 times per day. Many of these could be heighten (much better DCs) or reached. The pyro is actually a very limited class. The class is not very good at damage dealing or instant death abilities.
-Psiblade