In grip roll situation the first thing i'd try is a bit more Camber after trimming spikes... but never any more than 2 deg negative on buggys.
Rather than just snipping spikes of.... using a dremel to slick smooth off the area trimmed helps a lot too.
something else worth trying is toe in on front wheels as this will reduce initial turn in and help stop the outside tyre digging in under sudden load
ride height is critical to how the weight moves and induces roll in corners.
I always start with front wishbones horiziontal and rear driveshafts horizontal under race weight conditions with 2WD cars.
