Quote:
Originally Posted by StuckinARutt
But also, look for enemy gyms. They're much easier to take with 6 lower pokemon than 1v1ing your own gym
And also because of this, all gyms tend to balance to neutral, so if your 600 CP Pokémon aren't enough today, check back tomorrow cause most gyms will get cleared out several times throughout the day. Gyms held down by an army of 2000+ CP Pokémon could end up being replaced by a few 300 CP guys at any time.
Also someone mentioned earlier a great tip for powering up your own gyms. Use the lowest level Pokémon that can still win for the most gym prestige. I've been using a Pokémon that is just under the CP of the bottom guy but has a type advantage. Just kill one and quit for like 500 prestige points. Repeat as necessary. That also means it's good to have at least one low level Pokémon in your gym so others can power it up the same way.