Start by thinking about what led up to the amount of force used. For example, if you felt it necessary to initiate a takedown, articulate the reasons for this. Describe how the subject was resisting, what efforts you made to control the subject, what commands you were given, what the arrestee said, what the offense was, and any other circumstances involved.
The amount of force that police officers are legally allowed to use to arrest a resistive subject was determined by Graham v. Connor (1989). According to this U.S. Supreme Court ruling, use of force is analyzed under the "objectively reasonable" standard of the Fourth Amendment.
A court looks to the "totality of the circumstances" to determine whether the manner of the arrest was reasonable. The reasonableness of a particular use of force must be judged from the perspective of a reasonable officer on the scene, rather than the 20/20 vision of hindsight. Remember these legal concepts justifying use of force as you write your reports.
If you are effecting an arrest of a resistive subject, it is your job to get the subject under control, get him or her handcuffed, and take him or her into custody. All reasonable officers prefer to arrest someone who complies with their requests or commands. However, if the arrestee begins to resist arrest, then you must control him or her standing, by initiating a takedown, or disengaging and getting to another tool.
Based on your training, experience, and perception at the moment of resistance, you may choose the tactics you feel are most reasonable to accomplish the goal—which is taking the arrestee into custody while staying as safe as possible.