Well, the Specter would have died in combat against Selenia and the Wisp could only block one flyer so one would get through.
I think the Licid would have been better because either you let me have Selenia (doubtful
) or you pay the life to bounce her, in which case my Licid's ability is countered on resolution but remains a creature on my side. So I could keep using it either to keep bouncing Selenia or get another creature when you stopped casting her.