I use Artisan 4 when I build a .pakit for Forever, but we are upgrading to Artisan 6 in the near future. I heard it will be easier to upload and am really hoping adding the alpha to a kit will be less time consuming. It is my least favorite thing to do.
I have also heard that Forever is going to stop supporting Artisan 4 really soon, so you may want to think upgrading before that happens.