Rate my Black Old Gen Team

Hi Everybody! Its Turtwig26 here. I've been working on a hail team. I'm knew to hail teams so can you guys rate my team for me? Don't go easy on me!

(1) Abomasnow: Lead
Moveset:
Wood Hammer
Blizzard
Substitute
Focus Punch
EVs: 136 HP/132 Spd/240 Atk
Item: ??? (Any Suggestions?)

(2) Mamoswine: Physical Attacker
Moveset:
Earthquake
Blizzard
Stone Edge
Superpower
EVs: 252 Atk/4 def/252 Spe
Item: ??? (can you suggest something)

(3) Gliscor:
Moveset:
Earthquake
Taunt
Stone Edge
Arial Ace
EVs: ??? (some help here)
Item: ??? Any Suggestions

(4) Rotom F
Moveset:
Thunderbolt
Blizzard
Rest
Sleep Talk
EVs: 252 HP/ 120 Def/ 136 Spd
Item: Leftovers

(5) Walrein: Staller
Moveset:
Protect
Substitute
Toxic
Blizzard
EVs: 220 hp/252 def/36 spd
Item: Leftovers
Ability: Ice Body

(6) Tentacruel
Moveset:
Sludge Bomb
Toxic Spikes
Rapid Spin
Surf
Evs: 252hp/120 def/136 Spd
Item: Leftovers

Can you guys rate this team and fill in the blanks? Thanks!

Can someone please rate my team? Thanks!