Yea if i was doing them on like say an arm day, or a day where i would do tris then i would bump them up in the exercise order, but on chest day i like them better last after inclines and flat, everyones diff.
I've always thought leaning forward with a slight rounding of the back worked your chest more. I think I read somewhere to look like a seahorse, it's almost like a pushup.
Keeping your torso upright places more emphasis on the tri's.
I haven't figured out if the grip placement on the dip bars (wide vs. narrow) made any difference or not. Maybe that's just for comfort.