The thing with those heroes is that they're long dead during the events of The Hobbit and Lotr.
3) I think that dwarves have overall good spells in their spellbook.
6) Well the units need to based on something Apparently their design was based on Vikings.
All factons have monsters (as Edain team classifies them) for example: Ents, Eagles, Trolls, Dragons, Werewolf (Mordor), Mumakil,