Different Aim Assist hacks.
Bow Assist
Once you start using bow, module searches for the closest entity to your crosshair, and if it is possible to reach it with arrow and current bow power, then module sets its target as current entity. If you release bow you will rotate to the proper rotation on the server and shoot the arrow.

You can add below script to Status Overlay module to see what is current targeted entity:
Target Lock
Allows you to lock your crosshair to specific entity and follow its movement. Use Event Scripting module to automate enable/disable locking. Example:
Target Center
Target Top
Target Selection
By default Aim Assist targets only players. If you want to customize targets, use Events Scripting module.
Example script to target all living entities: Example script to exclude one particular player: