Are you getting -1/-2 in 35 min (very good!) and looking to get faster for a safety margin or are you getting -1/-2 taking as much time as you need. If it's the second it would be helpful to know how much time you are taking to answer all questions successfully, but really the biggest thing would be to start applying time pressure to yourself to force yourself to go faster. If it's the first one I'm in a similar position so I can't help much I'm afraid other than practice practice practice haha.