Poor Fort save.
d10 HD - not bad.
Medium BAB, on a character whose main point is to hit the opponent. No "touch AC only," either.
4 Skill points per level. Wants to use them for Hide/Move Silently, acrobatic skills, Spellcraft and other "magic-centered" skills (e.g. Concentration, Knowledges), UMD, and more.
You'll only get your bonus damage once per round, from either class. So you'll be focusing on dealing Psychic Strike damage and Hideous Blow damage every turn. Which will make you fairly immobile.
Other than Warlock invocations, your character has pretty much no abilities except this once-per-turn WHACK.