  This work is a methodical study of another option of the hybrid method
originally aimed at gamma/hadron separation in the TAIGA experiment. In the
present paper this technique was performed to distinguish between different
mass groups of cosmic rays in the energy range 200 TeV - 500 TeV. The study was
based on simulation data of TAIGA prototype and included analysis of
geometrical form of images produced by different nuclei in the IACT simulation
as well as shower core parameters reconstructed using timing array simulation.
We show that the hybrid method can be sufficiently effective to precisely
distinguish between mass groups of cosmic rays.
