You definitely don't want to use psychotic break. It's easier to get Nympho and Obsessive from the Sympathic link power. Get them to full (or nearly full) love for obsessive or lust for nympho. Turn on your insanity aura, then hit them with the love overload for obsessive or lust overload for nympho. It's still a bit random, but there is a good chance to give them temporary case. Hit them a second time and it becomes permanent. This work with the radioactive mod at least.
If I remember correctly, the procedure for vanilla is similar, except that you have to have fear and maybe other stats within certain ranges. Can't remember the exact numbers but they are in the 40-60 range. That info might be on the wiki.