This is, quite frankly, NOT a wise move. Kyurem-B is broken, and a shallow movepool or bad typing isn't gonna change that. Why? This is a Pokemon with 170 base attack, second only to Deoxys-A, PLUS a good 120 base Special Attack for backup, PLUS good bulk, PLUS decent speed. A mixed set will absolutely annihilate anything when it's under hail.
Of course, this is my opinion, and it's likely to change. Now if you'll excuse me, I'm off to PS to see whether or not I need to change my opinion.