As for speed and pad it depends on what you want it to do. It is actually capable of light correction on a polishing pad, along with filling some minor imperfections and leaving a very deep, glossy finish.
When I use it as a polishing step I use it on a white LC polishing pad on speed 4-5 on my PCXP. I do a couple section passes (2-4) and usually it's almost gone. I go around the whole car, and then wipe it off starting with the first panel I applied it to. It wipes off super easy even after sitting on the car for hours, or in the sun.
If using as a final step before wax, after a correction I use it on a black lc pad to just add depth and gloss to the finish. I use it on speed 3-4 on the PCXP and just go over each area a couple times. Again I do the entire car and then wipe it off afterwards.
I must say that Amigo is by far my favorite glaze due to its versatility. However, it should be noted that if using as a glaze you can't expect the filling ability to last for a long time. Even if topped with a wax or sealant, the glaze will be gone after a couple washes or rains at most.
hope that helps, and please ask me any other questions you have. I'm by no means an expert, but I have been using Amigo with great success for quite some time now.