2012 Suspension items

hello, my 2012 has almost 165k miles on it.

only things ive replaced from stock are the coils for the prius plus ones (cornering was improved, but made the ride even more awful that it already was), wheels from 15 inch stock to 17inch scion frs and tires to match that size wheel.

at what point does this car need new shocks? it don't bounce up and down on the highway or anything, i just needsfind a way to make the ride a bit better with that I'm using now.