I have a similar setup as you have, and I am experimenting with it. I placed the hop rocket between the pump and the recirculation return tube. I recirculated without the hop rocket for the last 15 minutes of the boil (so that I could sanitize the pump, hoses, and recirculation arm). Then, just before it was time to put out the flame, I hooked the hop rocket between the pump and the recirculation arm. I then recirculated the wort through the hop rocket as it was cooling down the boil. When I hit 60 degrees, I then directed the wort from the recirculation arm to the primary fermenter.
I know that Blichmann does not recommend this, but I figured that I would do it because I can normally drop my wort temperature to 60 degrees in about 10 minutes, I have done this a couple of times, and I have not experienced any plugging of the hop rocket.
So, I would say go for it and see what happens.