I think your Quant score is really good, so don't focus on Quant too much. Just make sure you know your key concepts well and continue doing a couple of problems a day during your preparation period just to keep in touch with these concepts.
But as for Verbal, you can definitely improve your score!! You have a whole month and that's enough time. Do more SC since that's the only place you can actually boost your score from what many 700+ test takers seemed to have indicated on debriefs. And for this, you can use MGMAT SC
and then do strengthen your CR skills by using Powerscore CR
or something similar and use the OG 12
and OG Verbal
Review for core concepts in these.
Take more practice tests towards the end of your prep (say with at least a week to spare) and use an error log
for this. I would recommend at least 4-5 tests (Each test prep company has one free test online, which you can take with a grain of salt, and the MGMAT CATs will be available too, if you haven't taken them). Use the error log
to analyze your weaknesses and focus the last week only on these weaknesses while keeping up with Quant all through the process and finally take GMAT Prep with like 3 days to spare at least.
At this point, you'll know what your weaknesses are still and just use the last few days to brush up on these as much as possible. Leave the last day relatively free and relax and you'll do well!!!
Good luck and hope this helps