These scholarii are the Horsemen of the Apocalypse.
The full stack gets obliterated by silver shield upgraded scholarii. One full stack of javelinmen from different regions (Afghan, Kurdish, Iberian, Lithuanian mixed up). I read tons of posts about 'Use javelins they dominate cavalry' and so I did.
I recently played some multiplayer battles as the Romans and completely annihilated the opponent and my Scholarii should've been destroyed by the melee engagements with heavy plate armored infantry. I've been wanting to do some tests since they are the strongest cavalry unit man to man. No, I think they're completely broken at this point.