Capable medium cavalry; armoured, shielded and armed with a lonchai and a kopis, they can be expected to hold their own in melee.
Hail Stratege! Fine noblemen forming a sturdy body of cavalry whose purpose is to crash into your foe and have the staying power to breach his line are here, arrayed before you. Armed with stout single handed lances and the mighty aspis of our ancestors, they can unleash a terrible charge. Once they have inflicted gruesome casualties on our enemies, they will switch to their melee weapon and begin a close-in slaughter. While men from Epeiros or Makedonia proper would have the sturdy Kopis, men further east may prefer the stout bladed war axe like that used by Alexander at the Granicus. They are armored with scale reinforced linen, greaves, and masked Phrygrian helmets that betray naught but the angry face of Zeus Pater or wrathful Poseidon. They are best used as a general purpose heavy cavalry. However, if facing the sturdier men from the east, or, Gods forbid, the elite Hetairoi or massive Kataphraktoi of the Seleukeis and Baktrioi, they may not have the staying power that they would against other heavy cavalry. Use them well, and they will give your enemies naught but the death they so richly deserve!
Historically, the lancers of later Hellenistic armies were divided into several types. Some cavalry performed shock roles as a secondary function, with the charge itself being their goal, and thus it became necessary to develop a specific force of cavalry who could charge in suppport but lend staying power to their comrades. This sort of cavalry was used to great effect by the forces of Syrakousai and Taras in the west, Epeiros, Pergamon and Makedonia in the heartland of the Greek and Makedonian peoples, and the even the great Hellenistic kingdoms of Aigyptos, Syria, and Baktria. They appear on both sides at the battle of Magnesia, where they and the Pergamene Hetairoi checked the advance of more heavily armored Seleukid cavalry, allowing the Romans to roll up the line of Seleukid infantry. Still, they have some weaknesses, and should not be expected to defeat elite troops in prolonged battle.
These cavalrymen well-armored and well-armed, their shields allow them to survive during melee combat. With these advantages, they can hold out against heavy cavalry but not outright beat them. They are also fast enough to catch light cavalry or skirmishers while at the same time wielding javelins for limited ranged combat (EB2). As such, they are excellent support for heavy cavalry.