I hope I'm not reviving a dead thread...it seems little older than a week or so. Anyway, I'm a Classical Philologist/Ancient Historian (whichever handle you prefer) and though a specialist in archaic Greece obviously Sanskrit is one of the languages I know. I'm really, really, impressed by this project, I've no modding skills but I'll try to help in other ways. Now for cavalry, I guess you can have Laghu Asvanika for light/swift horse but there are some other close matches, if you want variety. The skill of horsemanship was largely called aśvavidyā, cavalry as a collective was called aśvārohagaṇaḥ (as in a singular word, "cavalry) amongst other things, aśvārohagaṇaḥ (as a singular, last vowel is long for plural) is the most stand out name for "horseman" in general. So , obviously not a big deal, and I've no idea if these Classical Sanskrit words were used in Mauryan times (nor indeed do I know much about them!) but just to give you some variety.