Aw, just noticed Blade/CuleX is gone... I was hoping for a quick next round -_-
Alright, now that we blinded him, and last hope that lasts, use a Twister to completely make him silly. Then we'll strike with a Bubblebeam and finish with a Brine.
If it uses Double Team, then counter with a widespread Blizzard unless it's the first action. The Twister should take care of that
Twister~Bubblebeam/Blizzard~Brine/Blizzard
Edit: and not be aware of the almighty Octazooka... Unbelievable :p