Print with supports only up to 10 degrees. I used rectilinear supports and it worked great.
The bottom of the connecting part is tilted at a 60 degree angle. The back of the skull and the back of each side of the jaw are flat for better printing.

Should only support under the jaw area, inside of skull doesnt need anything.
0.28mm layer height is great. I used a 3mm brim, 3 perimiters, 5% infill.