In low grip/damp astro conditions of earlier this year, I ran the following main differences to the setup you posted:
AE White Spring Front
2 x 1.7mm pistons
37.5wt oil
30K Front Diff Oil
Same Shock mountings/camber/roll bar
AE Green Spring Rear
2 x 1.8mm pistons
30wt oil
20K Rear Diff Oil
2 on Tower, original inside on wishbone
Kit hubs (not the raised ones from 2wd)
Same Wheelbase/roll bar
2mm spacer on inside camber link
I also find that if you are softening the car up to get more grip, raise the ride height a bit to encourage it to roll/lean a bit more.
I prefer to run the slipper a little looser than expected; I just prefer the way the car behaves than with it being tight. But yes, I guess need to be careful not to run too loose so that nothing melts! You can get away with it a bit more when the track is slick.
HTH
