Nukes, Biological attacks are not. Chemical attacks also dont work on Sith or Jedi of a cetain level and above. Sabres can only be stopped by Cortoris material and then only shut down. Hand to hand combat. Study Martial arts.
Force powers rule here.
Sure, other powers are used here, but Force powers are override all else. Again, if your an apprentice, dont expect to be more Force powerful than a Master. Races - Mainly human. Groups - Jedi, Sith, Bounty Hunters, Gungans, Imperials, Rebels, Republic, take your pick. To defeat one of these is an incredible achivement as they have done the above and may seem undefeatable.