Yup, I can PROMISE you that damage was caused by AEFW's. Those bite marks a real tell-tale sign. I've never seen bite marks like that without AEFW's. I'd say your plan of action will depend on how many acros you need to treat. If you have a lot, I would go with levamisole. I had good success with 60ppm dips for 6-7 hours. I tried 40ppm dips but that only stunned the adults. I did lose a lot of acros after my first treatment but that was more due to my own fault in how I carried out the treatment. If you only have a handful of acros to treat, then I would go with the TMPCC. Regardless of what treatment you go with, do it once a week for 4 weeks in a quarantine tank.
What you do need to do is remove all acros and any acro tissue from your display for the entire course of the 4 week treatment. From what we know so far, the AEFW's cannot live without an acro host to feed on, but who knows what we will know tomorrow. FWIW, I left all other sps in my display when I treated my acros.