These are the standard DPS to Range. Lower range = Higher DPS. Higher range = Lower DPS. I made a small chart for reference. Keep in mind this is for base stats DPS, not effective DPS.

Average DPS to Range for LD units are a lot harder to calculate because there are 3 variables instead of 1; Standing Range, AOE & Pierce. 

Typically the average DPS for LD Units are around 3K~4K, but this number can greatly vary with different LD ubers.

Note that the table above refers to level 30 stats. For level 60 stats, you would simply double these values.

The table also does not account for the standard attack talent. To account for it, simply multiply the values by 1.2x.