advice

Hi- currently signed up for the september test- I have ONE test left (i’ve taken it 4 times) and would really like to get a score of low to mid 170s. i’m currently PTing at around 168/169- should I switch to the october test and just take it one last time then and have the extra month to study then apply right when I get my score back? I already have all my app stuff done. or is an october test pretty late in the cycle? thank you for your advice!!