The Mapleshade folks suggest you should use cones between speakers and platforms, and platforms and the floor = twice isolated. I would just experiment to see what works best. Instead of buying four sets of cones right away if you don't already have them, buy two and and test them while driving only one side of your system. Test them on top of the platform, on the bottom, and on both top and bottom, and see which way sounds best to you.
I don't use any cones with my platforms, just connect the speakers to bamboo platforms with Blutack and have the platforms sitting directly on the hardwood floor. Not saying this is best, just works well enough for me for now - much better than having speakers sitting directly on the floor without wooden platforms.
I don't use any cones with my platforms, just connect the speakers to bamboo platforms with Blutack and have the platforms sitting directly on the hardwood floor. Not saying this is best, just works well enough for me for now - much better than having speakers sitting directly on the floor without wooden platforms.