This is a 3 part battle, part 1 is the most difficult, you need to get namora to the gate, sounds simple but you need to clear a path through the enemies to do it. She also just wants to stand and fight I had to kill 50% of the Orcs then physically push her into the gate as she wont go on her own accord, very frustrating.
Enemies seem to be never ending.
Once she gets onto the balcony part 2 begins, relatively simple just defeat the traitor and his cronies, you wont have your squad you gotta do it solo, traitor has AoE abilities and can knock u back and stun you leaving u open to damage, equip tundgil with health potions before you even attempt the sinthoras battle (yes i know!!) as each battle leads into the next level without a break for travelling!! and use AoE to also stun and push back enemies.
Focus solely on traitor and damage him with heavy axe, he dies pretty quick.
Part 3 is very simple but again its solo fight, using Keenfire just hit Nodonn once using
and youl complete the game, 1 hit is all it takes, Congrats!!