I staple those b!tches on, glass (oh no! I mentioned mesh tape!) and hot mud 'em. I'm with you on the crushing the 90's for 135 if I need too. It seems like I end up with more fill though.Heres a trick for metal beads. Ever run across a house where the framers did not rip a stud at 45 to fill in the gap of an outside offset corner??
Use hand drive 16's, sounds crazy, but a 16 will travel to the opposing side and catch that sud, kinda like criss-crossing.
Oh, and I think you'd find 2-7/8 drywall nails better for driving those on...the head is much bigger, and the shaft is narrower (although still much bigger than standard drywall nails)