It all depends on what else you got.
I would do 2front 3rear but if you get a rear lower tie and rear sway, youll start to feel the rear end almost want to drag the front along, because the front is too squishy -- then you'd want to make the front a bit more stiff.

Generally ,rear a little more stiff than front.

But remember, stiffer isnt always better -- on the track its ok, but in daily driving/real roads you want the wheels to move and give a little.