I've been reading both the Mordor and Angmar balance threads, just would like to give some thoughts.
Carn Dum Bowmen need to take more trample damage. They take barely any un upgraded, and are the only Elite Archer in the game, besides Spearthrowers, that are able to get Heavy Armour. It also is one of the reasons why Mordor has a thought time against Angmar, but I'll go into detail in the Mordor Balance thread.
Carn Dum Pikemen's ability is very strong indeed. I don't think they should replace it, but I would suggest that make it only reflect damage from melee attacks, so you can kill them with archers without taking damage.
I will also agree that the Troll Summon might be a bit too strong. I suggest that instead of 3 Hill Trolls and Rogash, make it 2 Trolls and Rogash, but make Rogash as strong as he was in 4.3.
And I also agree that the Dark Obleisk is strong, but the problem I have with it is that it comes back really quickly, so the battlefield will be littered with them. Maybe a 20% increase on the cooldown would be nice.
Greetings, Hamanathnath