GMAT Strategy

I need advice. I have been preparing for atleast 5 months now with dedication of daily spending 2 or three hours on the test and longer tretch of 12 hours on my days off. I had the deliberation phobia as I read your advice given on the forum to someone. My problem is execution during test time. My last gmat was 31 days ago with quant 39 and verbal tanked to 25. I was too tired and exhausted by the time I got to verbal and in defense three hours of sleep the night before. I signed up with mgmat test with a tutor recomendation. My quant score has been on a good rested day 39-44 and verbal again is not working out. I can't seem to remain focus after quant to get to verbal. It is very frustratiing and I am not sure what to do. Another thing is, I recently use sc1000 file for sentence correction and lsat book for verbal Accuracy rate over 80%. I practice my quant and verbal on alternate days and block of 75 minutes to build stamina. How can I be better prepared for the retest and are you a tutor that would consider being avail incase I need help via skype. My last gmat prep score was 710, but that is biase since I have taken prep atleast 4 times. MGMAT score is 580. Quant 42-44 but verbal tanks. I am planning to take one more test. I haven't done the explanations for mgmat at my tutor recomendation he says they are the last priority at this point. If you would kindly give me advice. thanks