diet and cardio are the key elements to fat loss mate.
I favour a high protein/high fat/low carb diet and HIIT and tabata cardio.
I would estimate at your weight youd want somewhere AROUND 3000 cals a day to cut, but that obviously depends on your job, activity level, metabolism etc.
Id use SOMETHING like 280g prot, 180g fat, 50g carbs.
2x HIIT sessions/wk
2x Tabata sessions/wk
+ usual lifting.