I tried this myself with a few different scripts. I tried using the elemental reflection script to make counters work, but got a bug with the scope, and tried editing and making a version of counter states with Blizzard's Full Reflection script.
Neither worked. I suppose i'm just not smart enough to edit stuff and get it to work.
I just can't seem to find any counter state scripts out there, and all the ones i've tried making or using thus far just don't work.
It's a serious shame. If somebody would be willing to make such a script I can repay you somehow. I can't do cash or scripts. Maybe sprites or an in-battle event system or something. I'm really really good with the event systems