I'm riding Indy Stage 11 139 standards with bones hard bushings on the bottom and mediums on top, I kept the top washer on so I can get my ideal tightness/looseness without the bolt sticking out too far above the lock ring.
I've been enjoying this setup and want to get some hollows and put the standards on my winter/indoor ramp board. I ride an 8" board.
The story on the mixed bushings:
The stock bushings crushed and peeled. So I bought Bones mediums and really liked them. After a few months though, the front bottom bushing squashed out.
I bought Bones hard bushings but they turned out to be too stiff. So I came here, searched for threads on bushings, found a reply by someone saying they use hards on the bottom (at the baseplate) and medium on top (at the bolt) and it was perfect for them. So, I figured I'd try it before buying another pack of bushings. I love it. It could be that where I live it's been like 90-100 degrees and humid as fuck, but it's working for me now and feels great. Might be a different story after I move back to the east coast and skate in the fall and winter.