Baking

-turn off the global AO in the render settings
-apply AO object by object in the Diffusion channel of each objects material
-floor, watch body, face and date (face and date need to have evaluate transparency turned on)
-don't put it on the hands or transparent bits
-lower the face and date AO samples and accuracy (I did 64 and 70%) and it renders in 1/3 the time.
...of course if you're baking keep the samples up if you want
-select an object to bake and Render/Bake Texture (probably you need to join hoop, hoop ontop and body to get one bake since they use the same texture)
-replace the AO in the Diffusion channel with the generated bake image.
for the face either:
-turn off the hands and bake or
-bake a series of images so the AO follows the hands as they animate

And a critique - with AO the face looks old and used but the body looks new