doppleganger card should specify that your inheriting your oppents elder taint and arcane rather than saying you gain it. I went to use it to add onto my stats and it replaced them
you should be able to confirm the movement before its official..and also should be able to use up all turns even if its not at once. IE if I want to switch two units in one turn I cant
no calling it luck is like saying that chess is luck....you have to plan your moves according to how the opponent plays, the characters he has, and what moves they have....definitely some luck but mostly skill