Olog hai could not even fit through the keep entrance, since the entrance was 10 feet tall and 12 feet wide, barely enough for a horse to fit through. Why are they allowed past the keep? Not to mention not even a single Olog-Hai stepped foot on the fort in the battle, both proved by the book and movie. Also, with 40 players on Uruks, with that retarded 5 orcs to one troll ratio, you get overwhelmed by 8 plus trolls, plus pikeman and crossbowmen. I hardly EVER see rohan win, usually with 20 or less people.
I suggest that Olog-Hai's can bash the gates, though like the "forcefield" thing with balrog, they cannot go into the keep. I would also make the troll ratio 1:10 or something reasonable, where there is not dozens of trolls capturing every flag unchallenged. (With 40 orcs, there is 8 trolls. In the real battle, there was no trolls in the fortress, and if they should be there, then limit them! In a real battle, it could be 10,000 uruks and 2,000 trolls with THIS RATIO!)
I suggest that Olog-Hai's can bash the gates, though like the "forcefield" thing with balrog, they cannot go into the keep. I would also make the troll ratio 1:10 or something reasonable, where there is not dozens of trolls capturing every flag unchallenged. (With 40 orcs, there is 8 trolls. In the real battle, there was no trolls in the fortress, and if they should be there, then limit them! In a real battle, it could be 10,000 uruks and 2,000 trolls with THIS RATIO!)