My friend asked about the following situation:
He has Vader and an Imperial Royal Guard in play, as well as another unit (name unimportant) with 3 damage capacity. Only Vader and the other unit are participating as defenders. He's facing Yoda with 7 total unit damage coming across. I know that absent Shii-Cho training Yoda would resolve all 7 unit damage at once, placing all of it on Vader and not making the Royal Guard even attempt to use the protector, ultimately resulting in 3 damage being ignored.
But with Shii-Cho training, can you declare Vader as the recipient of 4 damage, then after the Royal Guard soaks up 3 of it declare Vader again as the recipient of 3 more damage? Do you have to declare all your targets and the amount of damage you will do to them up front, such that you'd have to once again declare 7 damage towards Vader to ensure his death, and again losing out on 3 unit damage?
Thanks everyone. Also, thanks to Toqtamish (I think it was) for emailing Nate French on my last question about A JOurney to Dagobah and Decoy at Dantooine. The idea came from the same friend. If there's no consensus on this I'm happy to email Nate myself this time, or someone else can jump on it, whatever.