RNG is a necessary aspect but some part of it need to be toned down. Rely on Serene Grace + Air Slash or using Hypnosis: fair game, you can disable many pokemons with it but one miss and you go down. Focus Blast has horrible accuracy: fair game, it provide every Psychic an out to Dark and insanely powerful so it should be inaccurate otherwise Psychic will be so OP. Draco Meteor or Leaf Storm has only 90% accuracy is not fair game, it doesn't provide more coverage, come with huge draw back is essentially a trump card to do a desperate move or catching opponent off guard so why should it miss during important time.