"Ideas good and bad." The two meant well, Rick knew that, but meaning well and being careles sometimes went hand in hand. He knew that all too well. There was hardly a tough decision to call in a survival situation that didn't have repercussions in some form or other.
If there was a judgement call that he would trust it would be Michonne's. She wanted to handle the wall situation? He wouldn't take that away from her or bat an eyelash in worry knowing full well it would be taken care of.
At the suggestion of magic folks Rick did make a face, only because he wasn't so sure who was included in that still that hadn't gone away. He knew Emma--but he wasn't about to ask her for anything just then. "Who do we know of that has that kind of...ability?"