Note: This team on PTD can get the Vermillion Gym achievement.
Level 34 Kadabra, set to Confusion
Level 32 Venusaur, set to Solarbeam
Level 33 Raichu, set to Thunderbolt
Level 32 Missingo., set to Sky Atack
Level 33 Growlithe, set to Roar [in this case, level is irrelevant]
Shuffle positions as needed. I had Growlithe permanently on the innermost southeast position, Vensaur mostly on the uppermost northwest position, Missingno. mostly on the uppermost northeast position, and shuffled around Graveler, Raichu, and Kadabra as the various waves came in. Solarbeam alone will mostly take out the enemy Raichus, so Graveler is the only needed back-up there.
It's a fun game. :B