IMHO (2) is the most important question: will you be engaging in combat at 11-20 squares? If you have an Archery Ranger and an Archery Bard, that's a strong range for the rest of your party, so consider being able to participate!2) You want to hit a target 11-20 squares away from you. Most ranged attacks need to be within 10, and many need to be within 5, so in most cases this won't come up as 10 squares is already behind the rest of the party. But in certain campaigns, this could be useful.
3) You get granted a free basic attack (or are granted a bonus to your basic attacks). If you don't have acid orb that attack is wasted. However, for most parties, this won't come up much if at all (You can make it come up with itemization -- with, say, Eagle Eye Goggles or an Impaling Dagger. The latter is a bit cheesy.).

(Dungeons & Dragons)
Rulebook featuring "high magic" options, including a host of new spells.