How much do you really need the 3 micron diamond paste?

Following what most people advice, I am thinking of a TM 4-sided paddle strop for edge maintenance. The choice, it seems, boils down to:

3.0, 1.0, 0.5, 0.25 diamond
3.0, 1.0, 0.5 diamond, 0.5 chromium
1.0, 0.5, 0.25 diamond, 0.5 chromium

Most people seem to just use the smaller grits, 0.5 and smaller, to refresh the edge. If the 3.0 is not something essential, I'd prefer the last option. Or am I missing something?

What would you get?