Manual - push stroke
60/90/60 for smaller width prints (I don't like the way blades can buckle when push stroking larger prints, but I might try it out someday just to see.)
70/90/70 for pretty much all of the rest.
straight 70 here and there. for a wide, over the seams/collars type of print for example.
never had good luck at all with duros over 70 and 60 and under buckles way too much with push strokes, this includes the bit of flatstock and transfer printing we do.
have 2 newman constant force squeegees that print very well but cleaning them is like one of the worst things you can put upon yourself or your staff.
someone has been mentioning 55/90/55, sounds kinda cool. I would probably rather a 55/110/55 or something though. I like the control you get with the stiffer duro in the middle of the sandwich and the coverage and forgiveness of the soft ones on the outside.