Yeah, cool first then pitch when both are the same temp, like 52 degrees. That's my preferred method too. If you're seeing activity already then step it down man! I'd step it down 5 degF per day but you might want to just drop it all at once. You might thermally shock your yeast if you drop it too quickly and they'll go on strike for a couple days.
'Kilgore Trout once wrote a short story which was a dialogue between two pieces of yeast. They were discussing the possible purposes of life as they ate sugar and suffocated in their own excrement. Because of their limited intelligence, they never came close to guessing that they were making champagne.'
—Kurt Vonnegut, Breakfast of Champions