Darth Plagueis was alive up until Palpatine was named Chancellor. Darth Maul was a match for Jedi Masters. Darth Tyranus was a very accomplished duelist even before becoming a sith. So I would say it was through training/sparring with his master and apprentices as well as the use things like training droids.
The Sith aren’t exactly known for their honor and loyalty. If a master wanted to replace an apprentice they would find a new one and begin training them first. When an apprentice wanted to replace their master secretly taking an apprentice could help them consolidate power.
Darth Plagueis was alive up until Palpatine was named Chancellor. Darth Maul was a match for Jedi Masters. Darth Tyranus was a very accomplished duelist even before becoming a sith. So I would say it was through training/sparring with his master and apprentices as well as the use things like training droids.
How could that be true? He already had an apprentice before he became chancellor, and there can only be two sith at a time
https://starwars.fandom.com/wiki/Order_of_the_Sith_Lords#Secret_apprentices
The Sith aren’t exactly known for their honor and loyalty. If a master wanted to replace an apprentice they would find a new one and begin training them first. When an apprentice wanted to replace their master secretly taking an apprentice could help them consolidate power.
I see. Thanks for the illumination