I have been on 20mg of Abilify since March 2013. I have slowly cut back on my dosage to 10mgs. when I don't take it I get really agitated and go ballistic on my husband sometimes. I don't like the weight gain, however for me not taking it I can tell a difference. I have read that taking anti-psychotics causes dementia later in life so the more I read about some of the medications that I have taken or are taking the more paranoid I become.cutting them back the way you described sounds like a good way to go.
warm thoughts to you and best wishes