My car was super low when I first lowered it, miscalculated the springs in the front (I think) and had to order taller ones, at its tallest it was still rubbing every turn or bump lol but mine are basically regular coilovers made from (at least at the time) ready available parts aside from the mounts, which were custom made by Bxx (who isn’t active here any more but I still talk to him). If you look through my build thread I think most of the info is still there aside from photobucket and th holding my pictures hostage, but it wasn’t too hard conceptually. I did raise it up I think two years ago because I went slightly wider and taller tires so it’s not quite as slammed, but it’s rare I rub.
for simplicity’s sake I can’t say I’d shy away from cutting coils if your goal is lowering, I’ve heard it doesn’t affect the ride too badly.