6:40 honestly im not sure that you can interact here with Rager. Idk. But I think because the casting of the exiled card is part of Narsets ability resolving then it just resolves..?
So the ability targets, then as the target resolved you exile the card and then may cast a copy of the exiled card, since the ranger was popped before the ability resolved it stopped the narset from casting the copy
Yeah originally I had hoped to bounce my sentinel and copy it to bounce the drannith that way if I didn't win I could take one more turn and win with tivit