Can anyone here help me out with my team?
I've never composed such a team before, and I'd really like some help from you guys. So far I have a Physical Wall/Spinner/Spiker, a Special Wall/Dual Screener/Wish-supporter, a Special Sweeper, a Physical Sweeper, a Mixed wall, and then I'm not sure what I'm looking for for my last team member? Any suggestions from you guys regarding synergy, pokemon choices and movesets are very welcome, since I don't really have any idea what I'm doing.

Sylveon *Leftovers
EVs: 252 HP/ 4 Sp.Att/ 252 Sp.Def
Nature: Calm
-Moonblast
-Light Screen
-Wish
-Reflect

Forretress *Leftovers
EVs: 252 HP / 80 Atk / 176 Def
Nature: Impish
-Earthquake
-Rapid Spin
-Spikes
-Explosion

Scizor *Leftovers
Ability: Technician
EVs: 252 Atk/ 4 HP/ 252 Spe
Nature: Adamant
-Quick Attack
-X-Scissor
-Brick Break
-Swords ance

Starmie *Life Orb
Ability: Natural Cure
EVs: 4 HP/ 252 SpA/ 252 Spe
Nature: Timid
-Surf
-Thunderbolt
-Ice Beam
-Phsycic

Dusclops *Leftovers
Evs: 252 SpD/4HP/252Def
Nature: Bold
-Mean Look
-Curse
-Confuse Ray
-Rest

For my last pokemon I was thinking of something along the lines of Noivern, since i think it's pretty cool, but any suggestions regarding role and pokemon are welcome. I really need someone to look at this for me!
- This is ofc 6th gen