How do I combine these two?
Any help would be appreciated 
Just create SSAORenderingPipeline or SSAO2RenderingPipeline and DefaultRenderingPipeline.
Example - https://playground.babylonjs.com/#5B0S2N#99
Note that you may create rendering pipelines directly from the Inspector. Right click on Rendering pipelines element and the drop-down list will be shown. And, of course, you may tune each pipeline through Inspector as well.
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