2 rules questions leaders epic action & on attack

OK, so as the title says I have two questions that I haven’t been able to get fully answered. Question 1: Can I use the on attack ability of a unit before or after the attack of the unit concludes. Example can I attack a unit with darth vader(darth lord of the sith) and deal my 2 damage to a unit before Vader and the Unit deal damage to each other?

Question 2: I noticed on Ahsoka Tano leader card like many other leaders the Epic action says “Flip her, ready her and move her to the ground arena.” But the Anakin leader’s epic action does not say that. Did they just remove that text to simplify it but he still ready’s up? Or does Anakin not come in ready?