Need help ..CAT:87,XAT:94 NC obc, Engg male fresher (8/8/6) profile July 2024 passout

My qualifications are CAT:87,XAT:94 NC obc, Engg male fresher (8/8/6) profile July 2024 passout, i applied to ximb, irma ,nmims, I have CAP Call and Sambhalpur,I don't have energy nor want to spend money to apply any other college if I don't convert any call I am planning to do sales and marketing job for 7-8 months while preparing and get 99+ percentile in CAT 2025. is this planning correct or wrong? Or should I apply to imi and IMT.