If you can use a 1, 1.5, 2, and 3 only, it will be much easier.

Then just use a blending comb of some type to do the area that would be a 5. Its going to be impossible to get all those lengths to fade on one head. You are better off going with shorter lengths, or else if you want a 5 on top, do 3,4, and 5 on the sides.

Basically, the less guards you have to use, the better fade.