The Klerouchon Agema is a very high quality phalanx force, formed of land owners with considerable military training. They are best used to hold the most crucial portion of a battle line.
The most numerous of the Klerouchon Agemata were the pikemen, who were often of very high quality. They carry standard equipment for pikemen, much the same as the Pezhetairoi, but are often of higher quality. The Klerouchoi are able, due to their status as lords of small estates, to devote a considerable amount of time to military training. They are best used like their Argyraspidai counterparts, to hold the most crucial portion of a line. They are great phalanx infantry, well able to hold against most opponents. If they have a weakness, it is the classic weakness of pikemen: flanking attacks.
Historically, the Klerouchon Agema formed the nucleus, together with the Galatai, of any Ptolemaic army. Since they had peasants to work their estates, unlike the Pezhetairoi, they could assemble at any time during they year and not have to worry about the management of their estate (due to compensations from the rich Ptolemaic government). They were almost always held in somewhat of a reserve, because the Ptolemaic kings did not want them to be badly mauled in any battle. This was due to the ever-present danger of native revolts within Aigyptos itself. They were dissolved during the Roman occupation, but many joined new legions being raised in Aigyptos.
Being pretty much an exact same unit to the Argyraspides (Hellenic Elite Phalanx), these men are a powerful phalanx that can pretty much hold the line against massive odds and also being a bit more resistant to flank attacks due to their high armor, good shields and high attack power on their swords.
To make much use for these men, one must place them in the center of your phalanx line so that they will not be easily flanked and can safely utilize their true strength. Beware of being outflanked by armor-piercing infantry or missile units however.