Reason for CTDs and glitches is buggy "eb/data/models_unit/ebmodel_hellenistic_cavalry_aspidophoroi_SOR__high.CAS" file (used by aspidophoroi and campanian cavalry). As a temporary solution, try replacing such references in DMB with something similar, like those of tarentinoi cavalry. You will get weird looking men, but no CTDs at least. Or you can replace textures as well to tarentinoi version. Or find better replacement candidate (eg some other "fs_hc_javelinman, fs_hc_swordsman" cav type in DMB).