I would be of the mind that the *only* use of the range ruler would be to check the distance to meet the Distance 2 from the edge and the Distance 1 from any other asteriod. To do anything else is really bordering on cheating, or at least an *extremely* open interpretation of the rules to me.
So I guess you don't plan out your overall strategy, and just randomly place your asteroids?
No. That isn't what he said at all. He is simply saying you cannot use the measuring device to know 100% without a doubt that you are placing that asteroid exactly where it is most strategically beneficial to you.
Do you not try to approximate in your mind where your maneuvers are going to put your various ships? You cannot put maneuvers on the board during the planning phase, but that doesn't mean you just randomly select maneuvers, does it?
Moving on...