Ok, here is a quick run down. Any levels below 20 and this guy seriously loses power rapidly.. but hey, the rules said level 20
I did this pretty fast, so I may have messed up on money, hopefully not though. I took a couple of liberties but I think that they are deserved.
Anyway, this does not shout at psychic warrior being overpowered, he still has some problems, but I went for maximum flexibility under whatever conditions might arise in a random universe.
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Psychic warrior 20
HD 20d8+20*con = 133.5
BAB +15
F +12 R +6 W +6 = F +21 R +15 W +21
Bonus feats 8 = Talented, Overchannel, psicrystal affinity, psicrystal containment, psionic talent x4
Feats 7 = psionic talent x 7
Bonus feat 1 = extend power
Skills: (69) Autohypnosis 18, Concentration 23, knowledge (psionics) 10, Search 18
PP = 127 (base) + 65 (feats) + 80 (stat) = 272
Powers
1st = 3 Inertial armor, Expansion, Synesthete, (6) metaphysical weapon
2nd = 3 Psionic lions charge, Strength of my enemy, Body adjustment
3rd = 3 Evade burst, Empathic transfer hostile, empathic feedback
4th = 3 Inertial barrier, Steadfast perception, Freedom of movement, (5) Dim Door, (6) energy adaption
5th = 3 Adapt body, Psychofeedback
6th = 5 Dispelling buffer, Form of Doom, Mindblank (personal)
Str 14, Dex 13, Con 14, Int 10, Wis 14, Cha 8
+2 str, +2 wis, +1 dex
Str 16, Dex 14, Con 14, Int 10, Wis 16, Cha 8
+ items
Str 26, Dex 14, Con 14, Int 10, Wis 26, Cha 8
Items: Girdle of giant str +6, headband of wisdom +6, +4 wisdom book, +4 str book, orange ioun stone, Standard of heroism, torc of power preservation, cloak of resistance +5
Adamantine chain shirt +1, gleaming, landing, linked, phasing, glamored, heartening, vanishing.
Adamantine shield +1, animated, heartening, heavy fortification.
adamantine two handed sword +1, suppression, wounding, lucky.
Beginning of the day this guy manifests an overchanneled inertial armor (24) +16, overchanneled metaphysical weapon (24) +7, mind blank (10), overchanneled dispelling buffer (10), overchanneled extended synesthete (2), overchanneled extended empathic feedback (24), overchanneled extended steadfast perception (8), overchanneled extended freedom of movement (8), overchanneled extended energy adaption (8), extended adapt body (10)
Then body adjustment to fix the damage. (20d8 = avg 90, needs about 14d12 to fix, 28pp needed)
Total pp spent = 156. Remainder for the day = 116
To refresh the powers that only last 8 hours requires 50 pp. So all powers could be up 24 hours a day, with a little help from the party cleric or picking up vigor instead of some other power.
Actually looks like a pretty fun character. Chances of a dispel working is not terribly likely with dispelling screen up. Average damage per round is pretty good, not as good as it could be, but good enough.
If you want to keep up everything 24 hours a day, and have a cleric in the party who doesnt mind dropping a few low level spells on you to heal you up, then he buffs up in the morning and pulling out the pp for the other 2 refreshes then he has 44 pp to play with for various abilities. It can be min/maxed farther, but this is a good start.