Can a dreamer do multiple map script actions on a single turn? I think the answer is "no". To be more clear, if a character has enough intent are they allowed to investigate two separate map tile scripts.
And one more simple question, are you allowed to discard unused cards from a hand (without spending the intent in any way)?
You can do player turns in a free-form structure. I.E., you can do all of your actions before the other players if they allow it. Thus you can do an action, move, then do another action all before the other players have played their first card. Pg 8 "If you favor a more free form game, you can play without worrying about the player's order and rounds until a specific situation calls for play order." You can discard cards before drawing your cards for the turn. Pg 8 "Before you draw, you may discard any number of cards from your hand.