Pokémon Crystal: Silver (Indigo Plateau)

The final rival battle in Pokémon Crystal. I am almost at the end of the game. There are only three major battles after this.
My team:
Level 50 Houndoom
Level 49 Skarmory
Level 50 Alakazam
Level 49 Golem
Level 51 Politoed
Level 56 Meganium