I am suprised you have worn out a Lansky stone though.....I have their "very coarse" diamond stone which I use for re-profiling....compared to how rough it was when I first got it....it is pretty smooth now....but not worn out...and that has re-profiled a lot of edges.
I may have made it sound worse than it actually is, The stones are just the regular not the diamond stones, The stones are concave not worn down to nothing, and they just can't put the edge on the blade I am used to from them.
Eventually I will buy what I need to flatten them out but, I have been doing some research and I am going to put the money into the Edge Pro sharpening system.