Assuming your amp will accept another set of spades than a second run to each speaker gives you the most flexibility.
Some folks will use a different wire for the highs than the lows.
Or, in your case you could split out two blue's and two blacks at the speaker end, put spades on them and hook them up to the highs.
Some folks will use a different wire for the highs than the lows.
Or, in your case you could split out two blue's and two blacks at the speaker end, put spades on them and hook them up to the highs.