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.

For Milotic, Recover over Rest should be obvious to name one thing. Also for Crobat try this moveset -

Brave Bird
Roost
Taunt
U-Turn/Toxic/Super Fang

And for Hydreigon I'd go with this moveset -

Draco Meteor
Fire Blast
Superpower
Roost

That's just a few examples of what to do regarding your team but hopefully it'll work out well enough for you.

So I should start with crobat and adjust accordingly?

It would be a good place to start yeah.

Oh and for Emboar, this should help.

Superpower
Flare Blitz
Wild Charge
Flame Charge/Fire Blast

And for Aggron I'd go with this.

Stealth Rock
Thunder Wave
Head Smash/Stone Edge
Dragon Tail/Earthquake

Best of luck to ya.

What about pokemon-wise? should I swap out anything for something else (preferably non-legendary)?