Personal experience would be Jelq, as I havn't used an exercise aid in my Penis Enlargement.
Out of the other two, i'd say they both can be effective as each other, the [words=http://www.mattersofsize.com/join-now.html]PA[/words] is for manual work, whereas the [words=https://shop.mattersofsize.com/products/sizegenetics-penis-extender]extender[/words] isn't. Both give their gains so I'm not too sure what to say in regards to the best.