6th level build
Githzerai
Psychic warrior 4
(30 point buy)
Str 8
Dex 16 (22) =10
Con 14 =6
Wis 16 (18) =10
Int 12 (10) =4
Cha 8
Racial:
+6 dex, +2 wisdom, -2 int
medium
30' landspeed
Darkvision 60'
2 bonus pp
3/day: catfall, concussion blast, psionic daze, inertial armor
at 11th level 1/day psionic plane shift
Power resistance: HD+5
bonus languages
psychic warrior 4
BAB +3
Saves: F: +4 R: +1 W: +1
Bonus feats: 2
PP: 5 (base) + 4*(stat)/2 +2 (race)
Powers known: 4, 3 1st, 1 2nd
Skills: (2+intmod)*7
Items: Monks belt
Feats: Overchannel, talented, weapon finesse,
Ok, so, this guy is weird

Still though.
BAB: +3
Attack: +9 (+3 bab +6 dex)
AC: 26 = 10 (base) +6 (dex) +4 (wis) +1 (monk) +5 (inertial armor)
PP: 19
PR: 9
The next items to get are any and all boosts for wisdom and then dex.
Is 26 high enough? fighting on defensive knocks it up to 28 and knocks attack bonus down to +5. Not much damage is being done, but the psychic warrior powers can help make up for that greatly. Useing compression can even further enhance this ac for a decent amount of time.
Human is also an option, but it requires pulling in more powers and I didnt want to sift through them, this guy bypasses that need somewhat
I believe that there is a feat somewhere that boosts caster level of spell like abilities, but I cannot find it. I started another thread on it before posting this but it didnt get much for responses unfortunately. There is a feat open for it to fit right in and it would likely up his ac by another point.
Edit: duh on me, had to fix something silly, bah. I dont know what to put in for that feat either if the one thing I think exists does not. But, anything that will help ac in some way, or help more hp, or simply 2 extra pp to power some defensive powers.