Dark Type Team: Needs Suggestions

[Augustus]

My Dark Team, needs ratings and suggestions :D

So I really want to do a Dark Team, as they are my Absolute Fav. type... I've done a decent Grass team before but I am stuck on movesets, EVs, natures and items for my Dark Team =/

Here is what I have come up with so far:

Sweeper..? (Absol) (M) @ (No Item) Trait: Super Luck
EVs: 212 HP / 44 Atk / 252 Spd
Jolly Nature (+Spd, -SAtk)
- Perish Song
- Psycho Cut
- Night Slash
- Sucker Punch

Special Sweeper (Houndoom) (M) @ Heat Rock
Trait: Flash Fire
EVs: 4 HP / 252 Spd / 252 SAtk
Timid Nature (+Spd, -Atk)
- Dark Pulse
- Flamethrower
- Sunny Day
- Nasty Plot

Sweeper..? (Honchkrow) (M) @ Choice Band
Trait: Super Luck
EVs: 40 HP / 252 Atk / 216 Spd
Adamant Nature (+Atk, -SAtk)
- Drill Peck
- Night Slash
- Sucker Punch
- Swagger

Phys Wall (Drapion) (M) @ Black Sludge
Trait: Battle Armor
EVs: 212 HP / 252 Def / 44 Spd
Impish Nature (+Def, -SAtk)
- Aerial Ace
- Toxic Spikes
- Taunt
- Night Slash

Special Wall (Umbreon) (M) @ Leftovers
Trait: Synchronize
EVs: 44 HP / 212 Def / 252 SDef
Calm Nature (+SDef, -Atk)
- Moonlight
- Baton Pass
- Curse
- Payback

Speed/Physical Sweeper (Weavile) (F) @ Muscle Band
Trait: Pressure
EVs: 12 HP / 252 Atk / 244 Spd
Adamant Nature (+Atk, -SAtk)
- Ice Punch
- Night Slash
- Shadow Claw
- Swords Dance


Any and all feedback or suggestions are extremely welcome.
I am fairly new to Pokemon in the sense of Competitive battling / actually building a team instead of going "ooh, I like this guy" but I have madea pretty decent Grass Team before :)