Ok, to start off. Always put HJK on mega lop, drain punch just dosen't do enough to be worthwhile.
On Kyu-B, use this set because your EVs are a little bad:
Kyurem-Black @ Life Orb
Ability: Teravolt
EVs: 4 Atk / 252 SpA / 252 Spe
Mild Nature
- Ice Beam
- Earth Power
- Fusion Bolt
- Roost/HP...