instructions on the site <| sep |> I try to keep only what I can use . That will include a collection of strong attackers for taking down enemy gyms , strong defenders for holding my own gyms which may overlap with the first group and several tiers of trainers at specific cp levels . The rest of the space is used for the grind , collecting , sorting , mass evolves then shipping the rejects off to the professor . The hardest part is building the trainer tiers . These should all be good fighters with good move sets . I am still uncertain as to the best IV for a trainer . A perfect IV does not necessarily make the best trainer because it may raise CP faster than it raises actual performance . The most cost effective way to get fighters into the tiers is to only evolve those that will have the right CP for a tier without powering them up . This though requires a table that can predict the CP that the mon will have after evolving . There are no assistant apps that do this efficiently enough to use durring the grind .