Rules:
No legendaries,
No megaevolutions
No pokemon past Gen 3
No Protect/Substitute TM usage
I may have Mew however if you put mew in my setup give me an alternative too pls ty

Teams I vs:
Gen 3 or lower
In future may vs some gen 4 teams
Many will consist of sandstorm teams, & dragon teams
Some may have Mew

Currently this is my setup, Should I change anything and what should my last pokemon be?:
Tyranitar Adamant, Sandstorm, ChoiceBand/Scarf/Leftover Idk which (Stealth Rock, Crunch, Earthquake, Pursuit)
Azumarill Adamant, Huge Power, Choice Band (Aqua Jet, Play Rough, Waterfall, Knock Off/Superpower)
Gyrados Adamant, Moxie, Leftovers (Taunt, Waterfall, Earthquake/Crunch/Bounce, Dragon Dance)
Gengar Timid, Levitate, Leftovers (Thunder, Shadow ball, Hypnosis, Dream Eater)
Blissey Careful, Natural Cure, Leftovers (Flamethrower, Soft Boiled, Toxic, Seismic Toss)


Thank you, please assist!!!