My Sentra dropped 1 7/8" front and 5/8" rear (now cut to 1 3/8" rear) with Tokico springs (spring rate 156F/152R).
I have -2.3° camber in front through crash bolts, and -1.3° camber in rear. Without the crash bolts, I had -1° camber up front. I also run 0° toe front and rear.
Although the rear tires are showing some camber wear after 10,000km, the fronts have had to be remounted outside-to-in to help even out the considerable wear. I am not sure if the wear is accentuated by my "spirited" driving style (heavy right foot) or merely the camber. I have also started running 35+psi tire pressure to help wear out the inside (marginally used it seems) section of the tread.
I run 13x7 rims for slalom, and with the alignment settings they are wearing very evenly.
I'd say drop it and stick with a good alignment with 0° toe and see what it wears like. A softer, taller sidewall will be more forgiving with nasty camber angles.