1Month left and I want to hit 720+

Hi guys - I would like to ask some advice on how to improve my current GMAT expected score. I have been preparing since August and I recently (in the last 2 weeks) took 4 different official GMAT CAT, receiving seemingly inconsistent results: 670, 710, 700, 660 (incredibly my last one yesterday). My quant score has been steadily around 47-48 whereas my Verbal score changed a lot (from 35 to 42).

I do not know how to proceed at the moment since I went through the MGMAT guides, all the official Guides problems and I am still experiencing different issues on the Verbal Side (particularly the sentence correction with an average of 6-7 errors per test) and lack of accuracy on the Quant section (I really feel to have mastered the theoretical concepts and I can apply them but I am continuously making accuracy errors).

I would like to improve my Quant from 47-48 to at least 49-50 and stay with my verbal consistently above 40.

Can you suggest me some valuable online prep course to hit my improvement targets? I have one month left. My current idea would be to:

- Use eGmat for the Verbal
- Revolutionary Math for the Quant

I would welcome any valuable advice.

Thanks a LOT!