Defensive playstyle

I'm just wondering if a defensive, passing play style will work well in high rank. Currently a diamond 2 level player and I'm not to good at the aggressive play style so I'm wondering if a defencive one will work? This is for 2's and 3's? I'm wondering if it will work or just 'work up untill a point'? Also with this play style would I be better of using the batmobile over the octane or would there be no real difference?