I found distracting it with a strong echo and then sneaking up behind to deliver a few sword slashes to be the best strategy. I used a slow echo like the lvl 2 Darknut, but you may have success with a lvl 2 Lizalfos since it attacks very quickly. Keep your distance as much as possible, use sacrificial echoes as a distraction, and attack whenever you have an opening! I had the lvl 2 sword so not even super strong and it took less than a minute to kill.