if you want handling perfection you dont drop the car at all.
see here, this is my suspension geometry from a 2" drop.
roll center is nice and low but without lowering the center of gravity, the roll couple is increased over stock (how much I havent measured that yet, I need to raise it back up to stock height and take measurements again) but Im sure its worse than stock.

1998 dodge avenger 4 cyl AT
Mods are:
Not enough