5th Gen Is this team good for a re-play through of White?

This is my team. How can it be improved?

Excadrill:
Item: muscle band
Ability: sand rush
-swords dance
-earthquake
-metal claw
-sandstorm

Sigilyph
Item: sharp beak
Ability: magic guard
-fly (only for transportation)
-psychic
-air slash
-cosmic power

Ferrothorn
Item: rocky helmet
Ability: iron barbs
-curse
-ingrain
-gyro ball
-power whip

Eelektross:
Item: wise glasses
Ability: levitate
-acid spray
-thunderbolt
-grass knot
-flamethrower

Samurott:
Item: never-melt-ice
Ability: torrent
-ice beam
-surf
-scald
-megahorn

Chandelure
Item: spell tag
Ability: flame body
-shadow ball
-flamethrower
-toxic
-energy ball