I think you are doing great on practice exams and recommend taking the exam in June to see if the practice exams match what your actual score will turn out to be. Once you take it you will be able to determine if you need to study more or take the lsat in August. I got into law school this year and looking back I wish I had taken the June lsat to see what my score would of been and have two months to work on it and retake it. Applications open up Sep. so you want to try and get your application in as soon as possible especially for competetive schools like that. You rather give yourself time than stress about not getting the score you wanted right before it opens. Keep up the good work and you will do great! Also take into consideration you have alot of work experiance and your essay and letters of rec. play a big role as well.