Seems like a LOT of work for ultimately a roughly small gain, is it worth all the work?
If body roll is that bad, fit a diffent ARB or springs or dampers/settings. Easier than all this...
when lowering a car this much along with exerting so much cornering force on circuits, the geometry will be all messed up and actually working "against" all those suspension upgrades, converting lateral forces into more roll.
fitting stiffer springs, bars and dampers will only band-aid the main roll issue and sacrifice on the other setup behaviour such as ride comfort and traction sensitivity.
we must spend abit of effort correcting the geometry and possibly lower CoG first to minimise roll forces and maximise tread area as a good foundation and then tune the springs & dampers to further improve motion control.