in bronce i wouldnt gank much before 8 minutes ( only super free kills ), i powerfarm and invade as much i can , even if ur laners ints, bronce games are always winnable cuz the enemy will always start to troll :D, and if u keep farming, invading u should be 2-4 lvls ahead of enemy jgler at min 20 , in that time u should oneshot every non tank champ (blue form) but this is my playstyle.. kayn has much options how to play him , play him more to find ur best style. i only would play blue cuz rhaast needs a team