This paper presents dynamic analysis aimed at optimizing Lower Limb Exoskeletons (LLE) to address crouch gait in cerebral palsy (CP) patients. The study focuses on understanding torque requirements at the hip and knee joints across various walking speeds to develop personalized assistance levels for achieving natural movement. Using Lagrangian mechanics, a dynamic model of the LLE is developed that incorporates mass distribution and geometrical properties, deriving torque equations for the lower limbs. Building on prior kinematic modeling efforts and Qualisys Motion Capture data, this study analyzes torque dynamics across walking speeds ranging from brisk to very slow to enhance active knee exoskeleton performance for CP patients. Results reveal distinct torque patterns, with higher positive torque values during pre-swing stance, gradually diminishing with slower speeds of walking, which supports hypotheses of reduced muscular effort. These findings underscore biomechanical phenomena such as muscular activation and eccentric muscle contractions, crucial for optimizing exoskeleton performance. Integration of healthy pilot data enhances insights into LLE dynamics, facilitating tailored assistance for CP patients and advancing mobility assistive technology. This study contributes to the optimization of LLEs for addressing crouch gait in CP patients, with implications for improving walking efficiency and reducing muscular fatigue. Future research directions may explore further refinements to exoskeleton design and control strategies based on these biomechanical insights.