Which size cone spanner(s) for 2006 10sp Campy hubs?

Yes but its MUCH easier to use two cone spanners rather than one cone spanner and one big spanner, so it's handy to have two of each size.

You tighten the hub with your first guess, then:

• if it feels tight pull both cones outwards into the lockrings
  
• if it feels loose tighten both lockrings in towards the cones
  
  

This saves ~15 minutes of faff.