I dont run into serious tangling problems either with a float or on a drift setup. My standard rig is a 3 foot 10lb chameleon leader to a triple swivel .I hang a 2/3oz slinkey on the bottom loop and attach my 12 lb mainline to the third loop. I usually set the float so the slinkey is running about 1 foot above the rocks . The cast is full arm rather than snap and I hold back slightly trying to run the blade about 2 feet above the fishes head.
In dirtier water I would lengthen the float to slinkey distance so the blade would be about 6"above the fish.
Without the float I usually just add a sliding pencil lead on the mainline.
I guess the main thing I try to do with spinners is to keep the blade turning as slowly as possible and keep the swing of the line to a slow pace. It helps to raise and drop the rod tip because when the blade stops turning and then starts again it starts turning in the opposite direction which reduces line twist. I avoid any constant retrieve speed even at the end of the cast to minimize line twist.
coot