Awesome. Yeah shield is the 2nd tallest formation after needle at sandia mountain in Albuquerque, nm. It's an amazing granite rock, some of the best mad challenging climbs in nm. I a party of 2 fast moving climber it can be done , in one day for sure. Since you wanted to get volume of climbing, we can hit other line on it as well and make use of all 4 days. I was have studied the route procrastination that is rated 5.8' 10-11 pitches. Standard routes on shield are 5.6 and if you want to do something really hard, there are for sure many route rated 10 and 11. Weather on thursday and Friday is partly cloudy. It's going to be somewhat cold. Yesterday it snowed so the trail may have some snow, but there should not be any on the route. I leave tomorrow night, let me know what you think.