Bleeding hearts are getting a little tired looking about now - you can cut it back now - and I'd do it as far down as the stem stubs can be hidden by the hostas. I like to leave a few inches on my bleeding hearts so I know where they are and don't accidentally dig over them before they emerge in the spring.

I would not cut peonies back yet; spent blooms are okay to cut so a lot of energy isn't expended in seed production. Next year's buds will not be affected by cutting just the spent blooms. But leave the foliage until around the time of the first frost at least.

Thanks so much! That's just what I wanted to hear!