With just coilovers you are limited with what you can adjust. If you had RUCA’s then you could give some - camber. A small amount of - is good to help with grip but go to far and you loose too much contact patch.
If you want the car to slide easier you could give it enough - camber to do so but you will more then likely have a harder time contoling your transitions.
The same goes with toe. I have a fair bit of toe-in and it works good for me.
I think the best thing for you would maybe to try a bigger sway bar. Find a used super hycas sway bar, they are bigger then the no-hycas and it will help you slide a little easier.
Chris