Board Thread:Suggestions forum/@comment-31200097-20170828212657/@comment-31200097-20170828234648

Gen. Grievous1138 wrote: Orcs never rode horses, and Angmar wouldn't have any Morgul-related troops regardless at this time.

Gen. Grievous1138 (LOTR Mod Wiki Admin) comlink 22:44, August 28, 2017 (UTC) Perhaps orcs could ride wargs, and there could be morgul warg armour. I don't really care if angmar has it. The easterlings for dol guldur and black numenoreans for mordor works fine.

http://lotrminecraftmod.wikia.com/wiki/Thread:377921

Also, the riders do kind of work with this suggestion, at least the mordor variant.