A closer look:
Abomasnow @ Leftovers
Sassy Nature
Snow Warning
Ev's:252 Hp/ 76 Spe/ 84 Sp. Atk/ 96 Sp.Def
MoveSet
-Blizzard
-Protect
-Wood Hammer
-Leech Seed
Because this is a hail team, who better to start with than Abomasnow? Yes it's very common and expected but with snow warning putting up a seemingly never-ending hailstorm it makes the foundation for my tactics. Never-miss blizzard naturally hurts and guarantees a ton of first-turn OHKO's along with wood hammer, early leech seed only furthers the stall tactics when combined with protect for scouting, and the lower speed to guarantee my weather goes up first.
Walrein @ Leftovers
Bold Nature
Ice Body
Ev's: 220 HP/ 228 Def/ 60 Spe
MoveSet-
-Surf
-Substitute
-Protect
-Toxic
Walrein is the staple of my hail team and many hail teams. Again he runs the never miss blizzard, and is nearly unkillable under hail with 12% Hp regeneration every turn. He is the reason for the title of this post as with substitute/protect combined with his unbelievably high defenses he can stall teams for 32 turns+(when combined with roar for pseudo-hazing) and in that period rack up over 200% of hail damage.
Gliscor @ Leftovers
Impish
Hyper Cutter
Ev's: 252 Hp/ 40/ 216 Spe
MoveSet-
-Stealth Rock
-Earthquake
-Roost
-Taunt/Stone Edge
Gliscor adds that needed stealth rock as well as handling certain threats like lucario with boosted defense and EQ, he can shrug off damage with roost and the last slot I was undecided on, taunt can prevent teams from setting up but stone edge provides me with coverage over flying types.
Frosslass @ Leftovers
Timid Nature
Snow Cloak
Ev's: 4 Def/ 252 SpA/ 252 SpA
MoveSet
-Blizzard
-Spikes
-Substitute
-Thunder Wave
This set replaces rotom and brings a new mix to the table. Snow cloak gives that extra dodging ability and combined with a thunderwave can cripple opponents on the switch in or during battle as she outruns many types with her base 110 speed, because of the 40% chance to miss now she can set up substitute and then proceed to spike with blizzard as her power punch.
Hariyama @ Leftovers
Impish Nature
Thick Fat
Ev's: 76 Hp/ 180 Atk/ 252 DEf
Moveset
-Rest
-Sleep Talk
-REvenge
-Whirlwind
Hariyama takes on machamp's roll by being my status abrorber, but also adding amazing bulk, a nice fire resistance, a base 120 power revenege since he will almost never outspeed his opponent, and the ability to pseudo-phaze for racking up entry damage.
Forretress @ Shed Shell
Relaxed Nature
Sturdy
Ev's; 252 Hp/ 112 Atk/ 144 Def
Moveset
-Toxic Spikes
-Gyro Ball
-Explosion
-Rapid Spin
Forrey adds to my dragon defence and adds even more bulk with the ability to set up spikes and also takes on the roll of tentacruel by being my rapid spinner with the added ability to explode and gyro ball for the occassional switch-in.

Abomasnow @ Leftovers
Sassy Nature
Snow Warning
Ev's:252 Hp/ 76 Spe/ 84 Sp. Atk/ 96 Sp.Def
MoveSet
-Blizzard
-Protect
-Wood Hammer
-Leech Seed
Because this is a hail team, who better to start with than Abomasnow? Yes it's very common and expected but with snow warning putting up a seemingly never-ending hailstorm it makes the foundation for my tactics. Never-miss blizzard naturally hurts and guarantees a ton of first-turn OHKO's along with wood hammer, early leech seed only furthers the stall tactics when combined with protect for scouting, and the lower speed to guarantee my weather goes up first.

Walrein @ Leftovers
Bold Nature
Ice Body
Ev's: 220 HP/ 228 Def/ 60 Spe
MoveSet-
-Surf
-Substitute
-Protect
-Toxic
Walrein is the staple of my hail team and many hail teams. Again he runs the never miss blizzard, and is nearly unkillable under hail with 12% Hp regeneration every turn. He is the reason for the title of this post as with substitute/protect combined with his unbelievably high defenses he can stall teams for 32 turns+(when combined with roar for pseudo-hazing) and in that period rack up over 200% of hail damage.

Gliscor @ Leftovers
Impish
Hyper Cutter
Ev's: 252 Hp/ 40/ 216 Spe
MoveSet-
-Stealth Rock
-Earthquake
-Roost
-Taunt/Stone Edge
Gliscor adds that needed stealth rock as well as handling certain threats like lucario with boosted defense and EQ, he can shrug off damage with roost and the last slot I was undecided on, taunt can prevent teams from setting up but stone edge provides me with coverage over flying types.

Frosslass @ Leftovers
Timid Nature
Snow Cloak
Ev's: 4 Def/ 252 SpA/ 252 SpA
MoveSet
-Blizzard
-Spikes
-Substitute
-Thunder Wave
This set replaces rotom and brings a new mix to the table. Snow cloak gives that extra dodging ability and combined with a thunderwave can cripple opponents on the switch in or during battle as she outruns many types with her base 110 speed, because of the 40% chance to miss now she can set up substitute and then proceed to spike with blizzard as her power punch.

Hariyama @ Leftovers
Impish Nature
Thick Fat
Ev's: 76 Hp/ 180 Atk/ 252 DEf
Moveset
-Rest
-Sleep Talk
-REvenge
-Whirlwind
Hariyama takes on machamp's roll by being my status abrorber, but also adding amazing bulk, a nice fire resistance, a base 120 power revenege since he will almost never outspeed his opponent, and the ability to pseudo-phaze for racking up entry damage.

Forretress @ Shed Shell
Relaxed Nature
Sturdy
Ev's; 252 Hp/ 112 Atk/ 144 Def
Moveset
-Toxic Spikes
-Gyro Ball
-Explosion
-Rapid Spin
Forrey adds to my dragon defence and adds even more bulk with the ability to set up spikes and also takes on the roll of tentacruel by being my rapid spinner with the added ability to explode and gyro ball for the occassional switch-in.