About to give up on Xenoblade...

[Link_to_the_past]

Your cpu should handle it though, the problem you mention is probably shader stuttering, try Ishiiruka build with the async shader option ticked. https://forums.dolphin-emu.org/Thread-unofficial-ishiiruka-dolphin-custom-version , shader stuttering is normal behavior in dolphin. Also use efb to texture and hle audio for better performance if you didn't already.