If faster than Glalie:

Turn 1: Calm Mind
Turn 2: Calm Mind

If Light Screen turn 2:
Turn 3: Calm Mind
Turn 4: Calm Mind
Turn 5: Calm Mind
Hail stops
Turn 6: Surf
Sealeo comes out; Light Screen wears off
Turn 7: Surf
Turn 8: Surf
Turn 9: Surf
Turn 10: Hydro Pump
TURNS LOST OVER SHOCK WAVE: 2.3

If no Light Screen turn 2:
Turn 3: Calm Mind

If Light Screen turn 3:
Turn 4: Calm Mind
Turn 5: Calm Mind
Hail stops
Turn 6: Surf
Sealeo comes out
Turn 7: Calm Mind
Hail starts; Light Screen wears off
Turn 8: Surf
Turn 9: Surf
Turn 10: Surf
Turn 11: Surf
TURNS LOST OVER SHOCK WAVE: 3.0

If no Light Screen turn 3:
Turn 4: Surf
Turn 5: Calm Mind
Hail stops
Turn 6: Surf/Hydro Pump (depending on Sp. Atk/PP)
Turn 7: Surf/Hydro Pump (depending on Sp. Atk/PP)
Turn 8: Surf
Turn 9: Hydro Pump
TURNS LOST OVER SHOCK WAVE: 1.5