Without knowing your performance on case and personal fit/ PEI, it is quite difficult to give an honest assessment.
My general advice would be:
1.Keep the overall workload light. After 100 cases, there should be nothing at this stage that you could significantly improve on (given that you learned and internalized the right habits for the case and prepared proper stories that actually hit the dimensions that consulting firms are looking for). Did you ever get an honest evaluation of your skills? Some candidates need 3 sessions with a coach and learn exactly the right approach while others conduct 100+ sessions, repeating the same faulty patterns, habits, and make the same mistakes over and over again.
2. Work on your perceived weaknesses in 3-5 peer case interviews, and conduct several chart, math, and structuring drills + speak through your stories and personal fit answers with a few friends (check out my answer here: https://www.preplounge.com/en/consulting-forum/how-to-prepare-for-a-case-study-10480) or alternatively do one final finetuning session with a McKinsey, BCG, or Bain coach (depending who you are interviewing with).
3. The closer you get to the interview, the less you should be doing and the more focus should be on enjoyable experiences to free your mind.
All the best for your interviews!