Never had any bugs with these, they work as advertised.
Pain is simple, but reliable. Good emergency button.
Betrayal is a fun gimmick, but suffers from the same issue as Force Confusion: brainwashed enemies just stand there once the others are dead and you have to wait for the 'spell' to wear off before finishing them. The suicide and insanity effects are a very nice touch though.
Hunger is perfect. Sith Lord is now worth it for that alone. It's not overpowered, but it is definitely as cool as it sounds.
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