Complex scintillating heterostructures, called metascintillators, have shown the potential to break the trade-off between high stopping power and good timing resolution beyond the golden standard of LYSO. However, the combination of materials that share the gamma interactions in a stochastic, event-by-event case, with different light yield, requires the decoupling between the measured energy pulse and the energy of gamma interaction. Furthermore, in the case of fast emitters like organic scintillators combined with standard dense materials such as LYSO, the fastest shared photoelectric events have an effective light yield that overlaps the Compton scattering of LYSO only events. To be able to discriminate and analyze shared photoelectric interactions, we are using optimized Coincidence Time Resolution (CTR) test boards with two output signals (timing and energy). A reference detector with dimensions of 3×3×5 mm 3 LYSO: Ce: Ca, and Detector Time Resolution (DTR) of 71.42 ps has been used.We demonstrate that while the energy measurement is not sufficient by itself, the energy of interaction can be deduced through the application of different features, such as the maximum peak and the slew rate of the timing signal. This allows to separate the shared photoelectric events from LYSO Compton of the same effective light yield. Using this understanding, which is based on the theoretical predictions, we are aiming at constructing an automatic acquisition protocol that will further include a direct implementation of the energy-sharing time-walk correction. This will then allow streamlined analysis and application of metascintillators in the laboratory and beyond.