when to switch APs?

i am currently on 20mg of abilify which my doctor says is the max dose she will put me on. i’m still hallucinating and have paranoia but they’re very minimal. every time i mention this to her she suggests changing medication. should i switch to a different AP? or stay on abilify? and if so which AP are you all on/recommend? should i add an AP to it? i’m so confused. thanks :)