I recently learned of this, and feel it must be a bug since augments with pet: DT- or regen+ effects luopans, but this piece does not.
source: http://www.bluegartr.com/threads/108...=1#post6219438
Later posts in the same thread show the Selenian cap working.
I first tried to post thiis in http://forum.square-enix.com/ffxi/th...-1-doesnt-work