would appreciate help on items my pokemon should have, moves and possible pokemon that could be REPLACED for others. Any comments will mean alot, I need help on this team as im slightly worried that I have two steel/ground pokes.

Samurott
nature: Timid
-Surf
-ice beam
-hidden power
-aqua jet

Arcanine
nature: adament
-flare blitz
-extreme speed
-wild charge
-crunch

lucario
nature: modest
-aura sphere
-shadow ball
-extreme speed
-ice punch

magnezone
nature: bold
-thunderbolt
-flash cannon
?????
?????

flygon
nature: adamant
-fly
-earthquake
-dragon claw
-fire punch

gliscor
nature: adamant
-earthquake
-acrobatics
-swords dance
-subsitute

if you can give me as much advice on this team as I cant move on and progress through the game until I am happy with my teams consistency and move pools. Again appreciate all comments given whether negative or positive