SWEET KISS / AGILITY (Good idea with this, but Agility may be wanted, if you want to use Storm Drain)
ICE BEAM (With the Bug / Flying and Grass-types infesting the place, Ice Beam is a good tool for NU)
SURF (STAB, fair synergy with Ice Beam)
RAIN DANCE / PSYBEAM / SILVER WIND (If you're using Swift Swim, run Rain Dance on it. If not, take your choice of extra coverage after the Special Attack boost)