Since you know that timing was an issue the first time around, I thought I'd provide some advice on that.
Try grouping five math questions together and spend no more more than 10 minutes on them. For verbal, do the same but spend 9 minutes instead. Use this strategy on both practice questions and simulation exams. If you fall behind schedule, make a strategic guess or two to catch up. Make strategic guesses on questions that you aren’t confident on or that would take you much longer than two minutes to answer. That way, you buy yourself some time and you can spend more time on questions that you can confidently answer.
Also, feel free to sign up for a free trial of the Economist GMAT Tutor:
https://econgm.at/freetrialoffer. I think you'll find our adaptive course to be helpful in improving your quant score!
I hope this helps. Best of luck on your GMAT journey!
Jessica