so here are some options i would suggest
offensive: switch slowbro to starmie, switch to choice scarf togekiss and switch chansey with something that is a little more threathening offensively. stamie can have 4 attacks or 3 attacks and rapid spin, forry can either be replaced or add an attack (if starmie keeps spin) or stay the same.
defensive: switch to defensive slowbro and replace heracross with something a bit bulkier, possibly conkeldurr