There's probably a few ways to do this, I think you can use a Select Node and choose Custom, select the radial option of Select the target with the minimum value of: and in the formula editor, select your object type, object, and then variable... example, SkillGroup.CicsoCustCare.LongestAvailable. The variable here is what's important (LongestVariable). So if the Select Node does what it should, it should take the minimum value of the Longest Avail Agent and send it off to that target (skill group). The Select Node only works with Skill Group and Enterprise Skill Group nodes, not the Queue node.