...I'd do her rec and I would address the elephant on the room - eg that she had rushed and pledged last year (even though that information is most likely already known) but I would clearly state why her "history" should not prevent your sorority from giving her another look, further consideration etc - be specific as to what her strengths are and what she would add to the chapter. Sometimes the collegians don't realize the value of certain PNMs so it behooves us alums to tell them

Also wanted to mention that at UGA, for instance, a sophomore is considered for rush purposes to be an upperclassman and thus has a separate quota #