Let me state all set for normal Kyurem from my thought
1. Sub roost earth power freeze dry
- usually use for pp stall
-buffed able to kill water type by using freeze dry
-freeze dry 32pp
2. Sub roost toxic freeze dry
-usually use for pp stall+ kill almost of pokemon except some steel type( heatran, Scizor-Mega ) but still have some chance to kill for waiting frozen status
-even use Scizor-Mega to counter kyurem but still need to think kyurem can pair with magnezone
-who said use gyro ball to kill kyurem is useless since kyurem just stall out gyro ball pp
3. Specs/scarf set blizzard freeze dry earth power and hidden power/focus blast
-Usually pair with slowking(chilly reception+future sight)
-snow buffed defensive x1.5
-Free blizzard acc 100% in snow
In conclusion, freeze dry is broken