[B2W2] Need team help

I don't know if my team has a certain strategy to it but this is what I came up with in terms of a balanced team.

MY TEAM

Emboar
Ability: Blaze
-Assurance
-Arm Thrust
-Flamethrower
-Blast Burn

Milotic
Ability: Marvel Scale
-Rest
-Ice Beam
-Surf
-Aqua Ring

Crobat
Ability: Inner Focus
-Fly
-Cross Poison
-Bite
-Air Slash

Aggron
Ability: Heavy Metal
-Earthquake
-Heavy Slam
-Dragon Claw
-(open)

Eelektross
Ability: Levitate
-Thunderbolt
-Aqua Tail
-Drain Punch
-Crunch

Hydreigon
Ability: Levitate
-Draco Meteor
-Work Up
-Earthquake
-Flamethrower

I also have no idea which items I should give to each pokemon.

Any help at all would be much appreciated.