A hybrid approach to room impulse response synthesis and auralization is developed in the context of a wave-stress tensor based model of late reverberation. This method for efficiently computing spatially varying energy envelopes has been demonstrated to represent the sound field in a sufficiently-diffusing 1-dimensional hallway above 250 Hz. To synthesize a realistic impulse response from the computed decay curves, the direct path, early reflections, and low frequency portion of the sound field must be calculated separately and then combined with the late field to form a hybrid scheme. In this work, we propose one strategy for generating the late field from the aforementioned energy envelopes and suggest the use of a typical pressure-velocity wave-based scheme to generate the other necessary sound field components. Because of the efficiency of the wave-stress tensor based method and the reduced demands on the secondary simulation technique, such a hybridization presents a promising architecture for future real-time auralization in large spaces that may be difficult to model using only a single method.