Best wire forming tool for me is jewelery pliers. One side is a cone and the other side is a curved channel matching the cone. Not the more common double cone style you'll find at the dollar store. The wire may pinch a bit on the sides, but I round off the edges on the cup side with a file. These pliers along with a needle nose with smooth jaws to make some tight wraps.
Making different size loop, bends or angles, maybe only with pliers?