How about you provide evidence that it is indeed Sask in that portrait rather than any other Glukkon before continuing down that road?
EDIT: Nevermind. I just noticed the comb-over. And
this image shows that what I thought was a moustache was actually his mouth, with teeth splitting up the blackness.
My best guess right now is that both Lulu and Sask were promoted together for their shared success. Because those building designs that JayDee posted really do look the same to me.