You have argued against yourself here - the whole point of a point is that it reduces the area of transmission to a tiny amount. Whatever you use will transfer some energy, its down to how efficiently they can reduce the amount of energy. Even the Oehlbach Shock Absorbers will transfer some energy. If you want to effectively decouple the stands from the floor then don't put them on the floor - simples.I've read lots of articles that indicate that there's no point in spikes (no pun intended) unless you have a concrete floor that you're trying to acoustically couple your stands to. Whereas on a wooden floor you want to try and decouple the speaker stand so the floor acts less as a soundboard and excites the the floor less.
Would you rule out wall-mounted bass traps?I should add that concrete slabs and the like are not an option.
You can buy some pretty nice looking alternatives to concrete slabs though. You could find a place that does kitchen worktops and get some finished off cuts of quartz or granite worktop to go under your speakers. Or even just a general stone mason might be able to sort something for you.I should add that concrete slabs and the like are not an option. The missus would become most fraught