Dark Empire: Luke vs. Palpatine
Whenever this topic is brought up, it's usually said by someone that Luke defeated Palpatine via the help of Leia, which is partially true. She did bond with Luke to cut off Palpatine powering his Force Storm and used Force Harmony on him.
However, people also say Leia empowered Luke during the Lightsaber duel before that Force Storm fiasco, which allowed Luke to cut Palps hand off. Where is the evidence that actually indicates that she empowered Luke during the dueling portion? In the comic there really isn't anything to suggest she bonded her power with him, the closest thing is when Luke asks her to bond with him says says "I already am" however that isn't solid since her phrasing it that way suggests she was in the process of bonding with him, not that she has bonded with him since the beginning or else she would said "I already have"
To support the idea that she didn't Force Bond with Luke, in the audiobook, skip to 2:25:40
During the duel, we see Leias point of view and this is what she says:
"They're both moving so fast I can hardly see them, I feel waves of power, the Dark side and the Light. But, I feel, the Light, is winning!"
Leia is actually surprised that "The Light" AKA Luke is winning and ofc Luke eventually does, slicing his hand off. She makes no indication she was giving her his power. Shortly after, when Palpatine unleashes his Force Storm in the Audiobook, Leia realizes that the Great Holocrons prophecy meant that she had to lend her power to Luke and join their powers together, indicating she wasn't doing that beforehand.
Not to mention no other source such as a guide that talks about the duel ever mentions Leia lended her power to Luke during the dueling portion, only during the Force Storm portion.
I could have obviously overlooked something, and if there's evidence that indicates Leia amped Luke during the dueling portion then please post. If not, DE Luke is seriously underestimated then and so is his later incarnations.