Yesterday, I played my dark blast/electric manipulation blaster. I finished the Keith Nance arc with hunting my evil mirror self. I have Dynamo (LOVE that revamp, thanks), and so did she-- but both times I encountered the EVIL version (not the good me), she was very low (at about 25%) on Health, and I saw her taking damage from her floaters. The amount and timing seemed to indicate that she was taking damage from her Dynamo power, not healing. I dropped a note to Support, and GM Aurarius was able to confirm my suspicions, and suggested I post here.
Hope this is useful.