No, Allen Modules are not enough to secure 650+ in NEET. Besides Regular NCERT Study and Standard Textbooks, Allen Modules do help you strengthen your Preparation, but arent enough if youre targetting 650+. You need atleast 2 strong Test Series, like Allen/Aakash, a strong test taking strategy and regular analysis of tests to boost your preparation to 650+Target. You should also consider DPP Sets by Resonance preferably and solve DPP Regularly apart from Regularly Attending and Revising Coaching Notes and Work. Strategy is a key factor in NEET and can distinguish a 650+ Score from a 500+ One.