The head I actually started a long time ago, but it got put into my parts bin as I could never figure out what to do with it. I was kinda working off some Ep 2 concept art, but it wasn't until this theme came up that I decided I had a strong enough concept for using the head and working out a figure to go with it.
I'll try to describe how I spliced the heads. Looking at the Aurra Sing head from the side, I cut out a 90 degree section of the back of her head, the full 1/4 top back of her skull. I did a similar on the Kit Fisto head to get the section with all the head tails, and super glued the two together as a rough fit.
I used "green stuff" to fill in the seams and smooth the transition between the pieces, and also to sculpt the eyes. I sanded a lot, but after painting the seam was still noticeable, which is part of the reason I went with such an elaborated paint job... it helps hide the transition.
I'm really happy with how it looks.
I appreciate all the feedback everyone, it always means a lot to know extra effort put into a custom is appreciated.