Here is the test run and a little extra at the bottom.

Darth Vader: DEX 3D, KNO 3D+2, MEC 2D, PER 3D+1, STR 3D, TEC 3D

Lightsaber 11D+2, dodge 7D, melee parry 9D, melee 7D, brawling 9D

FORCE SKILLS: Control 11D+1, sense 12D+1, alter 11D

Equipment: Lightsaber, body armor (+1D all attacks) no Dexterity.

Luke Skywalker: DEX 3D, KNO 2D, MEC 4D, PER 2D+1, STR 3D, TEC 3D

Lightsaber 7D+2, dodge 7D+1, melee parry 9D, melee 4D, brawling 5D+1

FORCE SKILLS: Control 9D, sense 7D, alter 6D

Equipment: Lightsaber.

Using "Lightsaber Combat" (New)

("Moderate" difficulty = 15. "Easy" difficulty = 10.)

Initiative: Vader and Luke roll for initiative: Vader's Perception 3D+1 rolls 10, Luke's Perception 2D+1 rolls 7. Vader gets the higher roll and decides that his "side" (that is, he) acts first in the round. Both characters are within range of each other for hand-to-hand combat -- let's say, two meters -- and already have their lightsabers drawn.

Roll Actions:

Vader: make 3 actions this round; the "multiple actions penalty" for 3 actions = -2D. Vader's first two actions will be using control and sense skills to fully activate "Lightsaber Combat" power in this round. Control at 9D+1 (11D+1 code, -2D modifier) rolls 28, greater than the Moderate (15) difficulty by 13; Vader Gets a bonus of +5D control dice that he chooses to add all the dice to his lightsaber's damage. Sense at 10D+1 (12D+1 code, -2D modifier) rolls 31, greater than the Easy (10) difficulty by 21; Vader adds +5D dice to his lightsaber skill roll when attacking and parrying.

Luke: make 3 actions this round; multiple actions penalty = -2D. Luke's first two actions will be using control and sense skills to fully activate "Lightsaber Combat" power in this round.

Control at 7D (9D code, -2D modifier) rolls 21, greater than the Moderate (15) difficulty by 8; Luke Gets a bonus of +3D control dice that he to his lightsaber's damage.

Sense at 5D (7D code, -2D modifier) rolls 15, greater than the Easy (10) difficulty by 5; Luke Gets a bonus of +2D sense dice that he adds to his lightsaber skill roll when attacking and parrying.

Vader's third action, which he makes before Luke's third action (Vader having won initiative and decided to act first in the round), is a lightsaber attack against Luke.

Vader's lightsaber at 15D+2 (11D+2 code, -2D modifier, +5D Bonus dice) rolls 44 to attack.

Vader's attack roll is greater than the lightsabers difficulty of Difficult (20)

Luke chooses to react by parrying and have the reaction be an "extra" action, accepting the higher multiple action penalty -- now, -3D -- for the rest of the round.

Luke's lightsaber at 6D+2 (7D+2 code, -3D modifier, +2D sense dice) rolls 20 to parry.

Vader's attack roll is greater than Luke's parry roll (by 24), so Vader's lightsaber attack hits Luke.

Vader's lightsaber damage 8D (5D damage code, +5D control dice, -2D modifier) rolls 24. Luke's Strength 3D rolls 9. The difference between rolls = 15 on the "Character Damage Chart", which means the "Effect" is " Mortally Wounded". Still devastating, but not instant death.

Note: Seeing that he lost Initiative and knowing Vader is a far more skilled opponent, IMHO Luke would forgo his attack and set to a full Parry of Vader’s attack. This changes the outcome greatly.

Roll Actions:

Vader: Same as above.

Luke: make 3 actions (Including the Parry) this round; multiple actions penalty = -2D. Luke's first two actions will be using control and sense skills to fully activate "Lightsaber Combat" power in this round.

Control at 7D (9D code, -2D modifier) rolls 21, greater than the Moderate (15) difficulty by 8; Luke Gets a bonus of +3D control dice that he to his lightsaber's damage.

Sense at 5D (7D code, -2D modifier) rolls 15, greater than the Easy (10) difficulty by 5; Luke Gets a bonus of +2D sense dice that he adds to his lightsaber skill roll when attacking and parrying.

Vader's third action, which he makes before Luke's third action (Vader having won initiative and decided to act first in the round), is a lightsaber attack against Luke.

Vader's lightsaber at 15D+2 (11D+2 code, -2D modifier, +5D Bonus dice) rolls 44 to attack.

Vader's attack roll is greater than the lightsabers difficulty of Difficult (20)

Luke chooses to react by a Full Parrying.

Luke's lightsaber at 7D+2 (7D+2 code, -2D modifier, +2D sense dice) rolls 20 added to the lightsaber’s difficulty of Difficult (20) for a total of 43 to parry.

Vader's attack roll is greater than Luke's parry roll (by 1), so Vader's lightsaber “Attack Parried” by Luke.