Quote Originally Posted by The Errant
1. The best Medium Cavalry in the game is the Sabaean Citizen Cavalry. They got better armour, the horses have excellent speed and stamina. Plus their secondary weapons are longswords which gives them superb lethality in melee. They are a bit more expensive than the Thrakikoi Prodromoi but they are overall somewhat better.
I didn't encounter those Sabeans yet. In my current epic campaign they are my only allies after Suebi and Romani betrayed me, so I won't face them soon.

Quote Originally Posted by The Errant
2. My bad. It seems the sword is primary and not secondary weapon. Anyway this puts the Kuarothoroi on par with Macedonian and Seleukid Hypaspistai. Basically a heavy phalangite that can fight extremely well in a melee. Just remember to use the sword against infantry and the spear against cavalry.
They are superb, and I use them in all of my four field armies as I limited the Hypaspistai to accompany the King, for roleplaying purpose.