Confused about Psionic PrC HPs

[Hawkeye]

Just got the expnaded Psionics Handbook and something is confusing me.

Psion D4 hps per level just like a wizard.
Psychic Warrior: (Fighter/MU equivalent) D8 hp per level and equivalent to classes like the Spellsword or Bladesinger
Monks: d8 hps
Fist of Zuoken, basically a Monk/Psychic Warrior....d6 per level!? What is the logic in this, in having a PrC that combines abilites from two classes that have the same HD, having HD that are less than the two? Isn't that like having a Fighter/Paladin Prc that gives d8 hps? Has this been fixed in an errata I have not heard about? Just really strange to me.

Hawkeye

 

[pawsplay]

They need not take anything but monk levels, so it may just be what they felt was balanced. In a certain light, they could be called monk/psions just as easily as monk/psychic warriors. I could see why loading up a monk class with psychic warrior powers and their hit dice could be seen as potentially unbalancing; what would be left for the psychic warrior, which has the same BAB?

 

[Someone]

Perhaps they felt that combining the monk's AC bonus with things like ectoplasmic armor, force shield, thicken skin and defensive precognition could make a too durable character.