A few tips (not that I'm a certified master) that has helped me A LOT!
Bondo the skull cap. It's easy to shape while it kicking whit a knife. After the bondo kicks you can bump up on one side of the antler and the left over release agent causes the antlers to pop off.
Stout Ruff the form, leaves more grooves for the glue to adhere to. Rub the glue into the grooves and then slop a hand full onto the lower neck area on the skin. Lubes the skin for easier slide. Don't get glue on the eye area.
I've never used a a stretcher, both of my hands still work fine. As long as the flesh side of the skin is wet, you should be able to slightly over stretch to aide pulling the skin over the face.
Whatdayamean old habits die hard? Kill that habit ASAP! Sewing sucks and always will! You can produce a better mount, guaranteed, every time, without the distortion than the OLD ancient way! Geeze!
After the skin is almost all the way over the bridge of the nose, set the eyes using apoxie sculpt, then use a better glue that buckeye for this area. Epo grip is good, I like the ear adhesive from McKenzie(I know from a previous post you dont care for that, but whatever) This will help to solve the problem of the hide glue drying to fast on you as well. Then set the antlers, work the eyes, taxi the armpits, blah blah, staple, trim and hang on the wall for final taxi for the day. Cuts a bout an hour or two off your day.
Just telling what works for me.
Mitch