All parts beside the orange tips snap fit together, use superglue to glue the caps to the main body.
Use supports for the central part of the outside shell ( Steep spherical overhang )
Make sure you have adequate cooling for PLA ( atleast one 50mm blower straight to the nozzle ) and 45° overhangs print perfectly on your machine before attempting this print.
If the pegs are to tight print them at ~97% ( they do fit on a lin_adv + perfectly dialed in printer but you wont be able to take the ghost apart again ;) )
Use superglue to glue the LED tealight to the back half sphere and the knob. ( can still be unscrewed completely to change the led / battery )
Print the eye cap, blue glass and orange tips @ 0.1 layer height.
LED Back sphere
Print the knob with supports and @0.1 layer height
Print without supports, superglue logo.
Central spherical shells
Use supports for the central part of the shell ( Steep spherical overhang )
Use multiple processes to get the best results, 0.2 up to where the ring indents end, 0.1 for a smoother top surface.