Styracosaurus said:
Well, that depends.
When you talk straight Psion, then no. The reason is that Psions have such lousy armor, weapons, hit points and so few worthwhile powers.
In your PW/Psion case, it might be. If you think so, you could just say that the power points do not pool. Separate powers, separate power point pools.
That would solve the problem for you. But I do not think it necessary.
Personally, I do not find it that unbalancing. First off, the Pw/P can only heal himself, not others. Secondly, if he spends all of his points on healing, he effectively becomes a second rate Cleric with no spells (i.e. 3/4 BAB, etc.) and lousy Will saves.
Even if he only spends some of his points on healing, he can only really do this out of combat at mid to high level.
So yes, he can heal himself up a lot. But, doing so will limit his ability to use his other psionic powers, making him less effective both in and out of combat.
I think it's basically a wash.
Do you consider a 10th level Bard who can cast 4 Cure Light Wounds (38 points), 4 Cure Moderate Wounds (76 points), 3 Cure Serious Wounds (70.5 points) and 1 Cure Critical Wounds (28 points) for a average total cure capacity of 212.5 points to be unbalanced?
The Bard has 10 first through fourth level spells left over (i.e. known) compared to the PsiWars 8 left over first through third level powers.
Seems like the Bard has an edge here and I know nobody who consider Bards to be unbalanced.