Need Suggestions for second timer

I took the GRE on 11 august and got 302(v148,154), was shocked by seeing it. My target score is 310+(q160+). On pp1 and pp2 I got 307,310. For the preparation, I used mainly a third-party app called Prepshcolar, Manhatten 5lb and for words, I followed the magoosh 1000 and Barron’s 333. Now I want to reattempt my exam on 28 September. This time, I want to follow solely the gregmat’s 1 month plan. Is it going to be a better plan or am I just going to burn myself again? Moreover, As I already learn many words, do I need to learn Greg’s wordlist too?