Hi, I have two questions I’d like to clarify, and maybe someone with experience here can help:

1. Brain Invaders and Old Han: I understand that Brain Invaders negates the leader's abilities. So, if I use this card against Old Han, he supposedly shouldn’t be able to defeat a resource in the next action phase, regardless of Brain Invaders being in play. Is that correct?
2. Sneak Attack with Darth Vader: There are two scenarios that confuse me:
   • First: I know Vader enters ready when using Sneak Attack, but I came across a situation where RebelResource claims that it’s possible to attack with Vader twice in the next action. According to this, Snowtrooper Lieutenant is summoned, and then Vader’s Ambush effect is triggered. That part makes sense, but shouldn’t it be impossible to activate Snowtrooper Lieutenant until Vader’s effect is fully resolved? In theory, trying to resolve Snowtrooper Lieutenant beforehand would be invalid. However, RebelResource argues that it can be resolved before Vader’s Ambush and says this is backed by supposed judges. Is that correct?
   • Second: My opponent suggests using Ambush first and then readying Vader. From what I understand, this shouldn’t be possible, because Vader enters ready, and if you use Ambush, he would remain exhausted permanently, preventing a second attack. Am I right?