Another way is Soulknife 2 / Soulbow 1 / filler 4 / Monk 2 / Ardent 2 / Ur-Priest 2 / Psychic Theurge 7
Feats for qualifying, Practiced Manifester, the Soulknife upgrades, a recharge set-up, some more combat stuff on the Monk side, etc ...
iirc - "someone" did a Lock type build on soulknife, it's around here somewhere.
Your DM's houseruled feats at 4th+ levels, are very similar to one of the Mind's Eye Soulknife updates.