Came up in a tournament yesterday:
I have Darth Vader, our dark lord of the Sith out. Opponent has a scrawny desperate Yoda hiding behind Old Ben's Spirit with one damage already on his green person. I want to play Force Choke, squeezing the last of Yoda's ancient religious protection by making him discard the enchancement.

Now since this is after I have played a Sith event, I figure I can use our lordship's Reaction to deal another blow to this annoying muppet. Unfortunately my opponent(and TO) says no, I must choose my target for the Reaction before giving out damage with Force Choke and that Yoda will take 2 damage at once, not one at a time. At least that's how I understood my opponent's argument because he didn't let me leave Yoda naked and with 1 damage on him.
I've looked around the rules and FAQ but have only found that Reactions must happen immediately after the triggering condition. Maybe the question is does Vader react after or as soon as I intend to play the card? And I can't see how this combo would deal 2 damage at the same time. Does the TO have an argument, or did I just get Jedi mind tricked?
And if you're reading this TO, you know I had other options so ruling didn't matter, I ain't even mad. Had good, close games and lots of fun, still love ya and not just because you gave me that sweet Arubesh Red 5 card. Looking forward to the next one.