I am not sure why the need to power the track(s) by all four throttles on each ZW. The object normally is that each Transformer is a "Cab". I may be off here but I always equated the Term Cab to be as being in the Cab of a Locomotive. So with two transformers you could have to "Engineers" operating two Locomotives. When operating in conventional mode running more than one locomotive requires all your attention as you clear a Locomotive into succeeding Blocks. Running two Locomotives would in my mind be mind boggling and subject to catastrophe(s). Also if you are capable of running four Loccomotives simultaneously, conventional Locomotives require a great deal of eletrical power, so the output of the ZW is divided over four Locomotives. Others can comment on whether the ZW can run four conventional Locomotives simultaneously. So this is all my opinion so have at it with your comments.
What I would do if setting up a conventional Pike, is use SPDT, center off switches. This would allow each Cab/Transformer power each of your blocks through it dedicated switch. This allows each Cab to align the Blocks for the Locomotive being controlled by two individual Cabs. So for instance lets say you have four blocks. You flip the switch for the Block to the Cab1/Transformer1 to power the block your Locomotive is in. You would, also assuming the next block your Locomotive is going into is vacant, could also be aligned for your Locomotive through the switch to your Cab/Transformer. As your Locomotive leaves its current Block you flip the switch to the center position to the middle off position showing the other Operator that the block is vacant and if necessary can be flipped to the Cab 2/Transformer 2 to allow the operator to enter the block. And the other Operator would be doing Likewise aligning the block for its Locomotive. Now a rotary switch could be used so that both Throttles on each Transformer could be able to send power to each block (but again the controlling two conventional Locomotives is confusing). If you use the Rotary switch there should be included an "Off" position. Another thought just crossed my mind. If your pike is sufficiently large so that your blocks are large, this may make the operating of multiple conventional Locomotives somewhat easier. So take this as something you might wish to think about as to how you run your railroad. I hope some of this makes sense.
