this. At 50 km/h you will hatch eggs, maybe not as fast as at 6 km/h, but at 50 km/h so catch much much more pokemons at pokestops = more XP. My XP/h is 35-40k (in NY Central Park)
//EDIT:
set the bot to keep 1 duplicate, and let the bot evolve all pokemons, EXCEPT of pidgey. Do also not...