The Morgul Pikemen come from the Tower of Sorcery, a sub-faction of Mordor, and they are heavily armored with a strong resistance to fear. They can only be trained at the Minas Morgul Outpost, which can be purchased for 2500 at an outpost plot. They are a late game substitute for regular Orc Pikemen but are mass produced slower due to the limit of outposts that can be built. As they are more resistant to damage due to their increased armor and are also more effective thanks to the fearless status, they are more resistant to Unit Interferer Heroes. However, they are still very weak to Mass Slayer Heroes.
Crack the Whip - grants them a double damage bonus against cavalry units, slowing them down twice as much, but this also reduces their armor by 25%. (requires Orc Overseer)
The Morgul Pikemen can be given the following upgrades:
Orc Overseer - If paired with an orc overseer they will gain bonuses and the ability Crack the Whip
The Morgul Pikemen are simply an upgraded version of the standard pikemen and therefore can be better utilized. However, they are present on a short supply since they are limited by the number of outposts. If joined with standard pikemen they can prove to be very deadly. Apart from that, the advice stays the same, during the extreme-late game stage they can be paired with the other Morgul units and overseers to form a deadly force once well micro-managed. They are still on the same level as pikemen, they just have slightly better stats, so therefore they have the same weaknesses (apart from fear) and the same strength in their numbers.