A little help on my team...

[Solyss]

I need to know what I need to do with my team, if anything. I'm thinking about replacing my Blaziken with a Typhlosion or a Flareon, or a Groudon, if I can get one, but I don't know if I should. Also, half my team is Dark Pokemon, is that a bad thing? D:

This is my current team:

Rayquaza
-Level 70
-Modest Nature
*Moves*
Extreme Speed
Outrage
Surf
Flamethrower

Absol
-Level 43
-Laz Nature
*Moves*
Swords Dance
Future Sight
Shadow Claw
Shadow Ball

Umbreon
-Level 42
-Serious Nature
*Moves*
Confuse Ray
Iron Tail
Cut
Return

Giratina
-Level 72
-Serious Nature
*Moves*
Shadow Force
Earth Power
Slash
Fly

Blaziken
-Level 42
-Impish Nature
*Moves*
Strength
Rock Climb
Rock Smash
Blaze Kick

Espeon
-Level 40
-Modest Nature
*Moves*
Confusion
Sand-Attack
Swift
Psybeam



Halp? =D