Demon's Souls [BLES00932]

Is there an updated summary of the recommended settings? Since the original post has some that don't exist anymore. I'm not having many issues other than intermittent shader compilation and some stuttering in Boletaria. I did see a post stating that everyone stutters a bit there, is that true? Will the other worlds be better? Just wondering if I can optimize more since it stutters but neither my GPU nor CPU is maxed out.

Specs
i7 8700k (stock, not overclocked)
Radeon R9 390
16GB 3000MHz RAM

CPU Settings
PPU: LLVM
SPU: ASMJIT
SPU Threads: Auto
Firmware: liblv2 only
Enable thread scheduler
Enable SPU loop detection

GPU Settings
Renderer: Vulkan
Framelimit: Off
AF: Auto
Resolution: Default
Resolution Scale: 300% (have tried 150% with no noticeable difference)
Resolution Scale Threshold: 16x16
Write Color Buffers
Use GPU Texture Scaling

Some potential changes I've seen recommended are setting the Preferred SPU Threads to 2, 3 or 4 and setting AF to 16x. I tried those but still have the stuttering.

Question summary: Any recommendations on settings to change? Is it true that everyone has some issues in Boletaria? Is it true that the framerate counter in the window title isn't accurate? (Since it seems to say 30 when I see obvious stuttering.)