Not sure why you're so set on a super deep turning radius on a ski that wide. It will not be an advantage in bumps (ever noticed that dedicated bump skis are narrow and have very little side cut?), it will put an incredible amount of twisting torque on your knees at that width, and it won't be any grippier than a bunch of skis in the 80's with radii more in the 17-20 m range. Since grip is not about turning radius, but construction, especially resistance to torsion. After all, GS skis, which have been known to have decent grip, have radii up in the 24-28 m range. Finally, a softer ski, all else equal, will not grip as well as a stiffer ski. So in a way, you're asking for two incompatible qualities: Bumps + grip on ice.
Two ways out: Early rise will allow you to have a stiffer, grippier ski that can still navigate bumps. Some early rise skis have surprisingly good grip, you might peruse the Elan Apex, Blizzard Bushwacker. Or a few twins can grip - Volkl Walls or Prophet 90's are decent, and Stockli Rotors are weirdly good - and will make you happier in bumps than a traditional tail.