New team opinions?

I have made a new team, would love some opinions.

Gliscor Ev spread 252 hp, 252 de, 4 sd Nature :Impish
moves: toxic, protect, stealth rocks, earthquake
Item: toxic orb, ability: poison heal

Scizor Ev spread 252 at, 100 de, 8 sd, 144 hp Nature: Adamant
moves: Swords dance, Bullet punch, Bug bite, Superpower
Item: Focus sash, Ability Technician  

Mega Blastoise spread 252 Hp, 252 sd, 4 de nature: Calm
moves: Rapid spin, Scald, Ice Beam, Dark pulse

Talonflame spread 252 At, 252 sp, 4 hp nature: Adamant
moves Brave bird, Flair Blitz, Will-o-Wisp, U-turn
Item: Choice Band, Ability Gale Wings

Keldeo spread 252 sa, 252sp, 4 de Nature: Timid
Moves: Scald, Hydro pump, Icy wind, Secret Sword
Item: Life orb, Ability Justified

Hydreigon spread 252 sa, 252, sp, 4 hp Nature: Modest
Moves: Draco meteor, Flash cannon, Earth power, Dark pulse
Item: Choice Scarf, Ability Levitate

To me this seems pretty well rounded. I do have to say though, there is no point in goving talonflame will o wisp, simply because it's choiced. Either switch the item to a lifeorb or give it another move. The other thing is, why sash a bulky pokemon like scisor? I get that it might be against fire types, but it doesn't really have anything to retaliate with against them. Msybe give it an item like leftovers

Thanks very valid points i will take them on board