phalanx

[Ibrahim]

Were these types of javelins still being used in EB's timeframe? if yes I havent seen any type of heavy javelin used in the east (by Armenians, or mercenaries of the east)

I think he means any big javelin, not necessarily a pilum type, or soliferum. and from what I know about Achaemenid warfare, they did indeed prefer javelins, at least in the cavalry arm.