I am speaking from experience here. I have a therminator, hop rocket and march pump on my brutus system. I can tell you that your plan will give you nothing but headaches. I tried so many different configurations and I found Mike McDoles system to be the best. Here is what to do.
First, remove the high speed thing inside of your hop rocket if you have one. Just a wing nut holding in place.
The best place for the hop rocket is actually INVERTED upside down directly attached to your boil kettle. I tapped mine directly into my kettle using the 1/2 in connection on the bottom of the rocket connected to a ball valve on the kettle which has a 1/2 piece of copper tubing coming out of it clockwise around the side of the kettle as a pickup tube to avoid trub.
I put a cam lock on the top of the rocket(which is now the bottom) and a small piece of hose connects that to my therminator which sits about a foot below the outlet of the rocket so gravity can work its magic.
The outlet of the therminator is connected to a piece of hose on my march pump. I rotated the head of the march pump so that the inlet is on the bottom and the outlet is on the top(rotate 180 degrees from factory position). I also added a ball valve to the outlet side of the pump.
The outlet of the pump is then connected to the top of my boil kettle to a ball valve which has a 1/2 piece copper tubing going back down into the kettle in a counter clockwise direction around the side of the kettle just above where my final boil volume would be.
This setup allows a couple things.
a. I can sanitize everything in place by simply slowly re-circing the last 20 minutes of the boil through everything.
b. I can whirlpool and chill at the same time
c. I can add hops or rice hulls in a hopsack to filter my batches. I simply re-circ the last 20 minutes as normal, then pump everything out of the rocket, take the lid off when the boil is over and add my hopsack of hops or rice hulls at that point.
d. I can avoid a lot of trub pick up with the pick up tubes. I let things settle for about 10 minutes after cooling and get almost no cold break in my fermenters.