I think he would ask her to take his sharingan and give it to Kakashi so he can have ''EMS''
yeah forgot about that dammin and it sounded so good.No that doesn't really make sense. First, you can't get EMS by implanting the same eyes into one another (plus kakashi isn't even an uchiha). Second, if he takes out his kamui, how is she going to get out of the dimension? They'll both be stuck there.
I think he wants her to crush Madara's rinnegan eye or kill zetsu. Also, I don't think Obito will just die like that..he needs to talk to either Minato/Kakashi/Naruto one last time before he dies.