Prosecutors are ethically precluded from filing criminal charges unless there is a reasonable likelihood of successful prosecution, taking into account not only the proof of guilt but also evidence of any defenses, as well as evidentiary limitations on what can be presented to the jury. To enhance your chances of getting your cases filed, therefore, your goal when writing reports and presenting cases to the prosecutor should not be simply showing that you had PC to arrest, but establishing that there is a provable case for court. The prosecutor will file cases that look like winners, and will reject cases that look like losers.
Don't Put All Your Eggs in One Basket
This old maxim holds true for what you do. It's often a mistake to get so focused on the most serious crime the perpetrator committed that you neglect to cover lesser offenses.
Just because you're seeking robbery charges, for example, doesn't mean you should neglect to include in your booking reports and complaint requests all other crimes the robber may have committed—maybe burglary, theft, assault, trespass, and others. If for some reason the prosecutor determines there's no likelihood of a robbery conviction but there's a solid case on other charges, you get a filing instead of a reject, and you get a conviction on some charges, instead of a straight acquittal on a single robbery count that might lead to a lawsuit and a continuing threat to public safety.
A conscientious prosecutor will double-check that nothing has been overlooked before making a charging decision. This is because the Supreme Court has repeatedly held that neither the prosecutor nor the judge nor the jury is bound by your analysis of the facts underlying your arrest. In other words, even if you've mistakenly arrested for a crime that could not be prosecuted, the arrestee can still be charged with and convicted of other crimes you didn't identify or pursue. (Devenpeck v. Alford; Scott v. U.S.; Maryland v. Macon)