Trina N Asked: Pokemon team please help me decide?

Whats a good pokemon team for Soulsilver?
I have already beat the elite four once and am now in kanto.
My team:
Gengar (45)
hypnosis
shadowball
curse
dream eater

Pupitar(45)
thrash
dark pulse
hyper beam
rockslide

Typhlosion(44)
Flamthrower
blast burn
Sunnyday
Earthquake

Dragonair(44)
Blizzard
aqua tail
dragon rush
hyper beam

Ampharos(44)
Signal beam
charge
thunder
thunderpunch

Gyarados(46)
Ice bite( or whatever its called)
surf
bite
dragon pulse

I am considering replacing someone with mamoswine, or maybe a psychic or dark type due to the fact that 4 out of 6 of my team are supper effected by ground/rock types. please if you have any tips on different movers or a switch in the line up it would help. And I am aware that they need higher levels before i take on the elite 4 a second time 🙂