The best thing you could do is to lower the weight. Aim for the desired rep ranges with good full range of motion, slower on the way down and faster on the way up. You'll hit that 90 for reps sooner than you think. If you really want to stick with 90, try adding a extra minute or two or rest before the third set.
Id strongly encourage you to do a quick warm up. Spike your heart rate just a little and do a few quick light sets of which ever movement you're starting with, building up the weight with each warm up set. This can be super important for avoiding all sorts of injuries, especially as the weights increase.
The best thing you could do is to lower the weight. Aim for the desired rep ranges with good full range of motion, slower on the way down and faster on the way up. You'll hit that 90 for reps sooner than you think. If you really want to stick with 90, try adding a extra minute or two or rest before the third set.
Id strongly encourage you to do a quick warm up. Spike your heart rate just a little and do a few quick light sets of which ever movement you're starting with, building up the weight with each warm up set. This can be super important for avoiding all sorts of injuries, especially as the weights increase.