Now, I don't agree with the idea that Anderson Squats should be performed with just singles. I used to do these when I was Olympic weightlifting and we would do triples. We'd deload the weight with each rep, meaning we would take the weight completely off our back by dropping under the bar and than getting reset and squatting it again.
I think any one of these 3 lifts will add pounds to your squat and also size to your legs so give one of them or give them all a try. I wouldn't try them all at once though. Rotate them in so you don't over do it.