to get ur attack much higher you need sythesis ur weapons. i recommend putting orichalcums on every weapon. They increase ur attack by 500 for each that is added. To do this this get Misty Lear, Mackwell, and Maria and use the alchemist invent strategy. When u see a number around 5100 try inventing. if it doesnt work through about 4 times reset and try again. This is easiest in Peterny.