I use whatever washable glue stick is cheapest at the time.
I prefer to use newsprint or Big Chief tablet paper as it will run through the printer without jamming but the easiest peeling paper I ever used was the old typewriter paper. It's hard to find it now, though. Thin copy paper is as close as you can get to it now.
I still haven't tried the removable freezer paper type. Still on my to-do list.
I just eyeball my seam allowance, fold back the paper and trim with embroidery scissors after every piece.