Is the answer to do whatever it says in your ops manual. In mine it says only one is in control, so my feet are on the floor. I know other airlines ops manuals say different.
What I do know is, if you are following through then you have to remember that you now have equal responsibility to the HP. I say that having had to have two goes at applying rudder on a 40kt crosswind landing. The first go I had I realised his size 12's were in the way, a shout later and I could apply rudder. Now as I always used to lead with aileron then you can probably guess that the roll axis became slightly unstable for a moment.
But, having said that, read your ops manual!