SanderScamper said:
My character is completely within the rules.
Not quite mate, sorry!
Power Force Swords? Daemon Power Fists? Bad munchkin! BAD! *slaps SanderScamper with a rolled-up codex*
I understand that the whole point of the exercise was to make something silly and over the top for a pit fight, but for the benefit of those who are reading this thread and asking themselves "Can I add the properties of a Power Weapon to my <name and type of melee weapon here> for stacking bonuses?" The answer is no, and stop being so beardy!
Weapons can only have a maximum of one prefix (such as "Power" or "Chain"). In almost all cases there are good in-setting reasons for combining multiple types of weapon enhancements being impossible, impractical, or just plain dangerously unsafe, but the simple fact of the matter is there's no such thing as a Force Shock Maul or a Daemon Power Axe or a Mono Evicerator because that's just silly . There are no rules for mixing and matching weapon prefixes for stacking benefits in any Dark Heresy or Rogue Trader book, either.
While tecnically Primitive Weapons, Force Weapons are only covered by the Primitive Weapons Group talent to allow Psyker PC's to actually use their signature weapon without needing to buy a costly Exotic Weapon Proficency as an Elite Advance. Force Weapons already come with the Mono upgrade (which is the only instance in the game of it legally stacking with another bonus to penetration, in this case Psy Rating) and have their own set of special rules which make them superior to a power weapon anyway. In addition, Force Weapons are not a special upgrade for a preexisting weapon, they're a specific set of weapons with their own stat blocks. Even if they could have a Power Field added there are no rules to do this.
Daemon weapons are built on a template Primitive weapon, which automatically excludes weapons from the Shock, Power, Chain and Exotic groups, though some Exotic Weapons may be valid templates for a Daemon Weapon. Without having my own copy of the Radical's Handbook to reference on Daemon Weapons I can't say if there's a technicality that exploits the fact that Force Weapons are covered by Primitve Weapon Proficency, but if there is such a loophole, the rule of common sense would apply to prevent this.