You could use a few lines from the 3rd episode of the non-canon game lego Star Wars the Skywalker saga by redubbing Hayden Christisen lines to Matt Lanter line
Duel over Coruscant: My Powers have doubled since the last time we meet count
Another Happy Landing: what, how can you be on the council and not be a master?
A Terrible Truth: You wanted to see me chancellor, How do you know the dark side, I’m going to turn you over to the Jedi council, Master Windu, I just learnt a terrible truth I think chancellor palpatine is a Sith Lord, you need my help if you’re going to arrest him, Yes Master
Showdown on Coruscant: I need him, I will do whatever you ask.
Duel on Mustafar: padme, you turn her against me if you’re not with me then you’re my enemy, you’ll try, I should have know that the Jedi were plotting to take over, but my point of view the Jedi are evil, this is the end for you my master.

Sam Witwer: Palpatine
Duel over Coruscant: Count Dooku, Dew it
Another happy landing: I am appointing you to be my personal representative in the Jedi council, I think they will they need you, more than you know, the senate will vote to continue the war as long as grievous is alive.