Yoda could outpace even the most skilled opponents with combat lightsabers. He favored Form IV, which utilized a lot of acrobatics and combined the use of the force in-between assaults to throw his opponents off. In a face-off against Darth Tyranus, Yoda was able to fight the Dark Lord to a stalemate, despite his adversary's expertise in the swift and dangerous Form II.

Darth Tyranus was an extremely accomplished Dark Lord of the Sith and was formerly Darth Sidious' apprentice. He specialized in lightsaber dueling, though his skills in the Force were not to be ignored. You most likely remember him as Count Dooku, the general of the Separatist army. Dooku used Form II, a style that used elegant and efficient movements to redirect opponent's attacks against them. Form II was thought to be the most effective combat style against other lightsaber wielders.

The last of the three lightsaber dueling masters is Mace Windu. He created his own signature style of lightsaber combat known as Vapaad. This was a variation on Form VII that was used by Darth Sidious. Mace Windu channeled his emotions of anger and hate without giving in to them completely, which allowed him to defeat Darth Sidious in battle.

A truly skilled duelist will know the basics of every form, but if you want to win against your foes, it may be best to specialize. While Form II is typically considered the best for dueling, do keep in mind that this was not the favored form of Yoda or Mace Windu.

It is not so easy to say that one form of lightsaber combat is more powerful than the others, but if you study all of them, you may notice the pros and cons of each. Which form to use is ultimately a situational decision.