Not quoting the whole thing but taking gyms isn't hard. Only issue is having the fucking thing not bug out.
I've solod a gym with four defenders from 500-1100CP using a 850 Vaporeon and random 600cp trash if it fainted. A decent poke.on with a fast attack let's you spam attacks about 3x as fast as the AI even if they have the same attack speed. Just dodge abilities and tap the shit out of the screen. Don't worry too much if your cp is a few hundred points lower, it doesn't mean shit when it comes to your dps it's mostly based off hp.
I've solod a gym with four defenders from 500-1100CP using a 850 Vaporeon and random 600cp trash if it fainted. A decent poke.on with a fast attack let's you spam attacks about 3x as fast as the AI even if they have the same attack speed. Just dodge abilities and tap the shit out of the screen. Don't worry too much if your cp is a few hundred points lower, it doesn't mean shit when it comes to your dps it's mostly based off hp.