To trip the diver I never use a hook set motion.. you'll break lines or rod tips. I just aim the rod right at the dipsy.. thumb the spool tight.. and jerk straight back. This takes the rod flex out of the picture.
Dl if you gonna use dipsys for salmon use wire. Can't stress it enough
when you say "jerk striaght back...takes the rod flex out of the picture" do you mean line up your rod, pointing straight at the dispy and jerk the rod in line with that 'direction' kind of like walking backwards with the rod pointing at the dispy still? This is similar to what I do when I snag bottom with my spinning rig. Seems like it might break the line though?