Shoot bows faster by drawing faster
This actually isn't as farfetched as it may seem. The {NoGravity} tag can be applied to any entity, including arrows, and we can use this to make poorly charged arrows travel farther.
Here's how:
Firstly, we need to make a "Ranger" team. This will be useful for targeting and executing and such.
/scoreboard teams add Ranger
Make sure that all "Ranger" players are put on this teamNow we need to turn off Friendly Fire. You will see why in a second
/scoreboard teams option Ranger friendlyFire false
Now on to the actual execution:
As soon as a bow is fired from a Ranger, set the entitydata of the arrow. Execute to all Ranger classes this command on as fast of a clock possible:
/execute @a[team=Ranger] ~ ~ ~ entitydata @e[type=arrow,r=3] {NoGravity:1}
This will make all arrows that spawn within 3 blocks of a Ranger (which are most likely shot from the Ranger) have no gravity.Now that your arrow won't fall, we need to make it go faster! On the very next tick after you turn off gravity, execute this command with a conditional chain command block:
/execute @a[team=Ranger] ~ ~ ~ summon creeper ~ ~ ~ {Team:"Ranger",ignited:1,Fuse:0}
This will summon a creeper that instantly explodes, propelling the arrow. However, it will not hurt the Ranger because it is on the same team as them.
Here's a visual: