Here’s how I see for the scene of Palpatine talking to the Ancient Sith lords (No reuse lines):
Darth Sion - Lord Sidious, I knew you would come. Do you need my lessons?
Palpatin - No, I don’t need the lessons.
Darth Bane - Why did you summon the ancient sith?
Palpatine - The end of the Jedi is near.
Darth Revan - We are the ones who used the dark side of the force. We are here before you.
Darth Desolous - The Dark Side is your ally, but I am its master. Thousands have fought against me.
Darth Teneborus - Sidious, you were motivated to complete the Sith Imperative.
Darth Desolous - I once killed many jedi in my life.
Palpatine - Most can lose their power that they have.
Darth Desolous - The council had killed me for what I did.
Valkorian - You are no weaker than any of the sith and your powers are stronger than any of the jedi.
Darth Sion - The energy from Moraband is more powerful than ever before.
Palpatine - The final phase is ready! The Republic will die and Skywalker will become my apprentice.
Darth Sion - But beware: He will kill you and restores balance.
Darth Revan - It is said that one who will own the other will rule the galaxy. Remember, the chosen one is the key. The one who owns him will control everything. I’m informing you to help your victory.
Palpatine - My apprentice will end the jedi.
Darth Malygus - Finally, we shall have revenge!
Marka Ragnos - Thanks to you, the sith will last forever! You earned the right to wield the thorne of Dark Lord of the Sith!
Darth Desolous - The sith are inevitable!
Exar Kun - The Dark Lords of the Sith shall rise again! Together, we will bring peace to the galaxy!