Help: New gym system

Why? since there is nothing new on the system but lower half of prestige gain, so instead of aiming only on first pokemon you should aim for second also.

6 Pokémon with half the cp of the first Pokémon you will face. If you only defeat him, it's +500, if you can defeat the first two it's +1000, and so on. I generally use pidgeottos, raticates, or other Pokémon I've evolved with undesireable movesets. I also use fully evolved Pokémon I've caught in the wild that are undesirable. After they are knocked out I send them to the professor. I can't remember the last time I used a potion or revive to level a friendly gym.

Can you dodge good? If you can't, I'd suggest learning that first since it will make it very easy...Look at youtube videos to learn that and once you can dodge pretty much everything, look at the bottom 1-4 mons and see their CP and type weakness.

Pick something with 1/2 or more than 1/2 CP to use against it or the 1st 2 (someone might leave something very low CP sometimes) and battle to get 500 prestig or more...

Generally, against Vaporean/Exeggutor, I use Parasect w/ Solar Beam or X-scissors (low CP mon).

Against Arcanine, Starmie with hydro pump or blastoise, etc...

That usually covers what most people leave already.

Dragonite -> Dewgong
Snorlax -> Vaporeon

I don't really power up my attackers so all their CP is low.

Bottom line IMO is just always use 1/2 CP. Even with the change, it's pretty easy to get close to 500 prestige per fight.