You should be able to connect the cables to two sets of binding post (as if you were bi-wiring) and simply add the jumpers between the posts. This should for all intents and purposes be same as stacking the spades on one post and then adding the jumpers.
As for the orignal OP question, you should focus on finding the cables with lowest impedance especially for the long runs.
Is there any way you could shorten the cable runs?
As for the orignal OP question, you should focus on finding the cables with lowest impedance especially for the long runs.
Is there any way you could shorten the cable runs?