I would temporaily switch out the Poemia and put it on the bottom. You may be surprised with the bass capabilities. Then if you like it , just get another pair of Poemia's.
I originally was kind of thinking like you and was going to use AZ Sen Satoris on the bottom and Poeima's on the top.
I now have bi wired Poeima's {shotgun} and Im very pleased with the results. I cant swear to it , but I beleive the sound is quicker on The Silver Poeima's, which may explain why you are hearing a phase shift.
I originally was kind of thinking like you and was going to use AZ Sen Satoris on the bottom and Poeima's on the top.
I now have bi wired Poeima's {shotgun} and Im very pleased with the results. I cant swear to it , but I beleive the sound is quicker on The Silver Poeima's, which may explain why you are hearing a phase shift.