Kamino - The Confrontation | Walkthrough SW: TFU II Guide
Last update: 11 May 2016
Main objective: Fight with Vader to save Juno
Current objective: Use all that you have learned to bring down the Dark Lord
You can't run and Vader will attack you a couple times throughout the corridor. Follow the instructions displayed during the QTEs. Remember that each time you fight off an attack, a counterattack is sure to follow, so keep alerted throughout the whole fight.
In fact Vader is the least problem while fighting on the platforms. Above all try not to stay on a platforms once the Sith is no longer on it. Be beside him all the time, taking care of the mutated clones in the first place. As the Force doesn't work on them, it's best to quickly approach them, attack with a finisher focusing on a normal attack followed by a throw. If you perform this at the right spot, the enemy will be thrown down from the platform. you can also use Mind Trick, assuming you've been upgrading it. Don't bother with throwing Vader back the items he'll be thrusting at you. It's better to fight him head-on.
The tactic of fighting Vader is easy. Keep on blocking, as he likes to throw his saber. Don't attack while he's holding the saber with both hands, as he's sure to parry then. At the same time be sure to attack once he's lowering his saber while holding it with one hand. At that moment he's vulnerable to attacks and you should be able to land a few before he's able to protect himself again. The first phase of the battle will come to an end once the green life meter of the Dark Lord runs out.
In the second phase of the battle, played during pouring rain, the tactic doesn't matter. Starkiller is in Fury mode, so he easily breaks even through Vader's block. Once you manage to pick Vader up and shock him with Lightning, mash the button as fast as possible. The enemy's energy will drastically fall thanks to it. Two moments like that and Vader will be near death.
The last phase of the battle consists of quick time vents. Just follow the on-screen commands and choose which side of the Force you want to follow. If you want to watch the second ending, you'll have to complete the whole fight all over again.