Just seat time is all you need. If you're off the accelerator you're on the brakes. Don't come off and let the car Iden down waiting for the brake point. Keep the shoe in and then on to the brakes once and heavy and try do as much or all of your braking in a straight line and then turn in, feather the throttle through the tightest part and then on the power as you're lined up for the apex and fast out.
From parabolica to tartan let the car go wide left down the back straight, over to the right and then aim down left for your brake point. It'll be easier on your tyres and you'll carry good speed down.