for a sword-warrior ascending is easy, it took me 17 seconds to beat the doppleganger
1. ensure you have a max damage sundering sword
2. use a build that includes endure pain, riposte and deadly riposte
as soon as the fight starts throw up endure pain, riposte and deadly riposte and then go and fight the doppleganger, while fighting your riposte will run out so hit it again a few seconds later the doppleganger will die from the damage he is taking TRYING to hit you... the dual riposte build is great against other warriors too
